No one has drilled to Earth's deepest layers yet. Even so, geologists have an idea of what those layers are like from studying seismic waves. Those are waves of energy caused by earthquakes. As they travel through Earth, the waves move quickly through some layers and more slowly through others. Geologists know some layers are made of liquid metal, such as iron. They know others are solid rock.

The crust is the top layer… all that we can see and what we live on.  You’ve probably noticed that the crust can look pretty different – mountains, oceans, lakes, plains, hills, beaches… you get the idea.  Actually, the way the crust is put together is the REASON that we have all of these different formations. 

Unlike the peel of an orange, which is one continuous piece, the crust of the Earth is made up of chunks of crust that overlap to cover the entire planet. 
These chunks are called tectonic plates.  You might have heard that name before, but you were probably talking about earthquakes.  Yep!  Those are the same tectonic plates!  Earthquakes are just the tectonic plates slipping a little bit where they overlap.  

Think about our class activity! Earth's layers are like a hard-boiled egg! Picture the yolk, eff white, and eggshell.  Earth's "yolk" is called the core.  It's thousans of miles below your feet, and is hotter than hot! The core is made of metals - mostly iron and nickel.  

Above the core, like an egg white, is Earth's think mantle.  The mantle is made of partially melted rock.  Finally, above the mantle is Earth's cool crust, the eggshell. 

The crust is our home sweet home. All you can see is part of it—canyons, fields, even oceans. The crust varies in thickness from 5 to 100 kilometers (3 to 62 miles). That may sound thick, but compared to Earth's other layers, the crust is thinner than that eggshell.

By 9/14, please answer the following questions in complete sentences!  Questions should be answered in two paragraphs (4-5 sentences per paragraph)

  1. Why do you think it is so important for scientists to understand the layers of the Earth?
  2. If no one has traveled to Earth's core, how do we know so much about it?


 


Comments

gorilla
09/11/2012 12:50pm

The rason we know so much about it is that we study seismic waves. Those waves are caused by earthquakes and it makes the tectonic plates overlap each other. I think it is important for scientists to understand the layers of the earth because it helps them know more about earthquakes and other naturel diasters.

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sponge
09/11/2012 12:51pm

1. It is important to know about the earths layers because it can help save lives by having earthquake warnings.
2. We know so much because earth quake waves can be read. And volcanoes bring out a little of the earths power.

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squirrel
09/11/2012 12:52pm

1. I think its important that scientists should know how many layers there is and what there made up of and how large are them?

2. Scientists send waves through the earth. When the waves bounce back, scientists use these data to predict what the earth is made up of.

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eagle
09/11/2012 1:24pm

2) Scientists know what the earth's core is about because they study seismic waves and the seismic waves are caused by earthquakes. As the waves travel through the different layers of the earth the waves travel quickly through some layers and slowly in others. Scientists conclude from these waves that in some layers there is rock and in some others there is liquid iron.

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eagle
09/11/2012 1:30pm

I think it is important because if scientists didnt know what goes on in the inner core then we would never know if the mantle or the inner core or any layer would blow up and then the explosion might effect us, animals, or even water. But scientist are smart and they know all about the layers because now they know what will happen and then we would all prepare for it.

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newt
09/11/2012 1:37pm

I think that it is important to know about the layers of the Earth. If we ever had a science breakthrough, and were able to dig down to the mantle, we would know what to expect. Also, we could figure out when earthquakes would start by studying the flow of the inner mantle. One more reason it is important to know about the layers of the Earth, is that if we didn't know why things like earthquakes happen,it could be a catastrophe because so many people would die.

The way we know so much about the inner core is that we use seismographs to measure the size of each layer. We could have sent robots that could withstand extreme amounts of pressure, but that probably would have been costly.

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starfish
09/11/2012 2:35pm

I think that it's important that scientists know about the layers of the Earth because they are a huge part of the planet that we live on, and they are extremely important too. The layer we live on, the crust, is nothing compared to the miles of other layers beneath us, so we need to know everything we can. The crust contains the tectonic plates, which are important to know about so earthquakes can be predicted and researched. The mantle is what makes up most of the Earth's mass, and the core holds lots of metals. Without the Earth's layers, there would be no Earth, so it's important we know about the layers.

I think we know about it because when scientists study the Earth's layers, they study seismic waves, and those help them understand. They can also tell from information they got from other layers. I think another reason they know is because they have predicted that when the Earth was formed out of rocks and metals, the heavier material sunk to the bottom and the lighter ones rose to the top, so maybe that's why they think that the Earth's
core is made of iron, because iron is heavy and it would sink to the bottom. I think it's really cool that scientists can predict so much about things they've never seen.



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Rabbit
09/11/2012 3:17pm

I think it is important for scientists to know about the earths layers because they are the ones that keep us updated and they need to be able to tell when a earthquake is coming and that is shown from the earths layers.

We know so much about the earths core because we have examples of what it is like. For example we have the eggs yolk that we know is like the core so we can learn from that.

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Ostrich
09/11/2012 4:00pm

It is important for scientists to understand the layers of the earth because if we wanted to know what our earth-- our home is made of or how it was formed. Just maybe knowing that the earth started out as a hot ball of rock and metal has to do with the way our earth is destroyed. The inner layers if the earth cause things to happen on the curst, if we want to know how earthquakes happen or about tectonic plates then we need to know about the layers of the earth.

Even though we haven't dug a hole to the center of the earth, we still know about the layers of the earth because of seismic waves. Seismic waves are waves of energy caused by earthquakes that travel through the earth. They move quickly through some layers and slower through others. Because of these waves we know what the earth is made of and about the layers it has.

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Dolphin
09/11/2012 4:20pm

I think its important that scientist understand the layers of the earth. I think that becuase if they need to do an exsperiment about the layers of the earth they need to know what the layers of the earth is and what it does. Somtimes the scientists like to travel to outerspace and see the world and then if they go to outterspace and then see the world they arent going to know what the earth is made of.

I think that even if people never traveled to the earths core that they know about it because scientists found out how the earths core started and when they found out they told everyone about it. The earths layers formed when all the heavier layers sunk to the bottom and the lighter layers rose to the stop. Such as the crust it is the lightest layer becuase its made up of light rocks and soil, while the innercore is made up of moltin lava wish is in the center of the earth!

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wombat
09/11/2012 4:30pm

#1The layers of the earth are so important because if no one knew about them someone would dig down and they would explode because of the heat!
#2 i think that people think that the earth’s core is made of iron because astrophysics and the earths magnetism

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Hedgehog
09/11/2012 5:38pm

1.I think that it is important for scientists to know what the layers of the earth are and what they are made of, because that way we know how natural disasters happen. For instance, earthquakes and tsunamis are caused by plate tectonics shifting and over lapping each other. Volcanos are caused by plates separating and letting hot magma to come through.
2.We know about the Earth's core because we believe that the Earth started out as a hot ball made out of iron and nickel. We also know that the Earth has a magnetic force which has to come from Earth so we know that the outer core exists.Scientists also think that as the earth cooled down and hardened the heavier parts sank to the middle and the lighter parts rose to the top.

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lynx
09/11/2012 6:10pm

I think that it is important for us to understand the layers of the earth because things that affect humans, are usually important. If scientists did not know what was in the center, or how it affects us, they might send an expedition team to study, and they would be in danger, or even perish from the intense heat of the inner core. Volcanos and earthquakes are activities that happen between the earth's layers that can cause death and destruction to humans. It is important to have more knowledge and understanding, so we can tell that these activities are going to happen early, and if possible, escape, or make other plans to be safe, for example, building earthquake proof buildings, or bridges.

If no one has traveled to the center of the earth, how we know what there is to some degree is by studying seismic waves. Seismic waves are waves of energy. These waves of energy are caused by earthquakes. These waves move quickly through some layers but slower than others.

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Unicorn
09/12/2012 1:24pm


1.I think it is important for scientists to understand the layers of the earth because of many reasons. One reason that’s its important is because we need to be able to know how things like earthquakes happen and how things like valleys form.
We also need to now how earths magnetic field came from. Scientists want to know how these things formed so that they may learn more about how earth itself formed.
Scientists also might want to know why our planet can sustain life, and why others cant. Scientists want to learn everything that they can about the world. What’s under our feet has to do with much more than you think. The inner core and outer core are what causes the earth’s magnetic field to form. Things like mountains and valleys form due to the movements of the tectonic plates. You can see why its so helpful to know about the layers of the earth.
2. We know so much about the earth’s layers because of things called seismic waves. Seismic waves are waves of energy caused by an earthquake. The speed of the waves varies through each layer telling scientists what the layers are made of.
I think that we know much more about the crust than any other layer because we live on it and cans study what makes any kind of landform form.

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Rat
09/12/2012 1:29pm

I believe that the study of the layers of the earth is important for many reasons. One reason is that if we don't have an idea once we can drill down below there's no telling what's down there. Another one is that it's a big question that people want to know. And you want to know what causes things like earthquakes.

The way that people now what's way down there are seismic waves. Seismic waves are energies that go through the earth. We get seismic waves through earthquakes. We can measure the seismic waves through today's technology. That's all folks!

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Sea Lion
09/12/2012 1:36pm

I think it is so important that scientists understand the layers of the earth because that can enable them to predict when earthquakes will happen. That is good because earthquakes can be deadly and destructive. It may also be important to miners that need to drill for metals and minerals.
We know so much about the earth’s core because geologists figured out what those layers are like by studying seismic waves. As the waves travel through the earth, the waves travel quickly through thinner layers and slower through thicker layers. This helps geologists to figure out what the layers are made of.

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Shark
09/12/2012 2:19pm

It is important that scientist know and understand the earth’s layers. Knowing what’s underneath the surface helps figure out why plates move and why volcanos erupt in certain places. It also helps to find buried natural resources such as oil and gas. In addition, it helps people find out where earthquakes might occur. Knowing about the interior of our planet can let us compare the earth with other planets and understand the special conditions that make it our home.
Scientists know about the earth’s interior because they use different methods to find out. They track seismic waves. Seismic waves are waves of energy that travel through the core of the earth. They also study the behavior of earth and other planets in space. Analyzing rock and mineral samples are strategies for exploring the composition and behavior of the earth’s deep core.

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Cloud Panther
09/12/2012 2:30pm

The reason that scientist need to understand the layers of the earth is … So they know when and why volcano’s erupt or when tsunamis are made and flood parts of the land. For example the massive tsunami in japan the government found out about it several minutes before the tsunami struck. That advantage saved thousands if not millions of people.

No one on earth has drilled to farther than the crust yet. Even so, geologists have an idea of what the layers are made of from studying seismic waves. Earthquakes cause the seismic waves. As they travel through Earth, the waves move quickly through some layers and more slowly through others. Geologists know from this that some layers are made from liquid metal as a example iron. They know others are made of solid rock.

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Panda
09/12/2012 2:51pm

I think it is important that the scientists understand the layers of the Earth. Now, if they did not know about the layers then we would not be learning about the layers right now. They know about the layers because the are studying the seismic waves. Now they also know that some layers are made of liquid metal and others not so much. That is why I think scientists should know about the layers of the Earth.

We know so much about the layers even if no body traveld to the Earths core. We know so much about the layers, because the scientist use the seismic waves. They use them to see how many waves there are. That's what happens if no one has traveld to Earths core.

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penguin
09/12/2012 2:51pm

We know so much about the layers of the earth from studying seismic waves. Seismic waves is energy that is caused from earthquakes. When they travel through the earth they go faster through some of the layers and slower through other layers. They have found out that some of them are made of liquid metal like iron and some of them are solid rock.

I think it is inportant for scientists to understand the layers of the earth. I think this because it could help them find out when a earthquake may happen. How they could maybe do it is with todays technology the could read the seismic waves and hopefully determine when it will hit. So then they can evauate where it will hit before it hits.

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09/12/2012 3:11pm

I think one reason scientist need to know the layers of the earth is so that they can understand natural disasters that are caused from the layers. For example, if scientist didn’t know what the crust was, we would think that an earthquake came out of nowhere!! The truth is, earthquakes are caused by the shifting if the tectonic plates (We wouldn’t know that either). Knowing this information can help with many things scientist do. Some Scientist just study the earth!

So Speaking of all this studying, how do scientist know what inside the earth if they can’t dig that far? Even with their high- tech machines, they would never make it. Well, scientists study seismic waves. Seismic waves are caused by earthquakes. As the waves run through the earth, they go slow on some parts, and faster on others. That’s how a scientist determines what material the layers are made out of.

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Fish
09/12/2012 4:02pm

1. Geologists study seismic waves. seismic waves are waves of energy.They are created by earthquakes They help geologists understand the layers of the earth the waves travel through the earth. The waves move slower in some layers and quicker in others. That tells us about the layers of the earth.

2. I think understanding is important because there is a lot of things involved with the layers of the earth.There is the earth's magnetism involved in the layers. It is also important for scientists to understand the layers of the earth because they need to know if something dangerous could be below us. That's why its important.

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Zebra
09/12/2012 4:02pm

I think its important for scientist to know the layers of the earth. I think its important for scientists to know the layers of the earth because if something happens then scientists know what to do about it. Another thing that I think is important because like us we students need to know about the earth and how its formed. That is why I think scientists should know the layers of the earth.
We know so much about the the earths core. We know so much abut the earths core because scientist have studied the earth a lot. That is the reason why it think we know so much about the earths core.

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barracuda
09/12/2012 4:17pm

it is so important for scientist to discover the layers of the earth becauseyou need to know what is under you. over time, scientists have discovered how the earth is and there needs to be stuff below us because how do we know what causes the earth's magitisum? And other things.

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Screech Owl
09/12/2012 4:33pm

It is important for science to understand the layers of the earth for many reasons all of which in turn will concern our safety as a civilization. The first reason is knowing the mass of the earth which is vital for our understanding of how gravity and other forces in space might alter the earth’s course in time. The second reason is understanding how our own tectonic plates shift around us, which will in turn let us understand earthquakes. The last reason is probably is the most vital: understanding the earth’s magnetic field, without which we could not survive on our planet. Understanding our earth’s layers is a matter of our security not just curiosity.

Modern science has seismometers which you might have heard of recording earthquakes, but they can also be used in places that aren’t near any fault lines. You might ask what they use them for because there normally aren’t going to be earthquakes were they are placed. It’s true that they won’t detect any earthquakes instead they’ll detect the reverberations of earthquakes through the earth. Using the data from these reverberations or echoes they can determine what the earth is made of and using physics they can find the placement of the material. In recent years some of this equipment has picked up a new type of earthquake which is so subtle it has gone unnoticed for years. These tiny quakes put more tension on a bigger fault and eventually cause the major quake.
-Screech Owl

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Screech Owl
09/12/2012 4:35pm

It is important for science to understand the layers of the earth for many reasons all of which in turn will concern our safety as a civilization. The first reason is knowing the mass of the earth which is vital for our understanding of how gravity and other forces in space might alter the earth’s course in time. The second reason is understanding how our own tectonic plates shift around us, which will in turn let us understand earthquakes. The last reason is probably is the most vital: understanding the earth’s magnetic field, without which we could not survive on our planet. Understanding our earth’s layers is a matter of our security not just curiosity.

Modern science has seismometers which you might have heard of recording earthquakes, but they can also be used in places that aren’t near any fault lines. You might ask what they use them for because there normally aren’t going to be earthquakes were they are placed. It’s true that they won’t detect any earthquakes instead they’ll detect the reverberations of earthquakes through the earth. Using the data from these reverberations or echoes they can determine what the earth is made of and using physics they can find the placement of the material. In recent years some of this equipment has picked up a new type of earthquake which is so subtle it has gone unnoticed for years. These tiny quakes put more tension on a bigger fault and eventually cause the major quake.
-Screech Owl

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cow
09/12/2012 5:44pm

It is important for scientists to know about the layers of the earth because it will help them learn more about the earth. Also it will help them learn about the tectonic plates and how they are shifting and, when and were there might be a earthquake.
scientists know so much about the layers of the earth because of seismic waves. The seismic waves travel through the layers in different ways so they can tell the difference between the layers and what they are made of.

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09/12/2012 5:49pm

R.K. 9/12/12
It is very important for scientists to understand the layers of the earth. I think this because if it wasn't important to scientists, no one would care about studying it and we would never find out about the inner core, outer core, mantle and crust. We would never know that tectonic plates moving are the reason that we have earthquakes. We would never know that the inner core is mostly made of iron and it's the center of the earth. We wouldn't know anything if it weren't for scientists who studied these things with time and effort. If scientists never understood the earth, we probably wouldn't have some of the inventions and technology we have today. We need scientists to study and care and treat the earth's layers importantly for us to be able to say “I know why the earth is like this and why the earth is like that.” It is very important for scientists to understand the layers of the earth.
If no one traveled to the Earth's core, how do we know so much about it? We know so much about the earth because geologists have an idea of what those layers are like from studying seismic waves. Those are waves of energy caused by earthquakes. As they go into the Earth, the waves move quickly through some layers and more slowly through others. Geologists know some layers are made of liquid metal, like iron. They know others are solid rock so that's why the waves go slower in the rocky areas and faster in the liquid metal areas. Geologists then studied the waves for a period of time and studied some more until they found answers with the technology and teamwork. This is why we know so much about earth.

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Panther
09/12/2012 5:53pm

Scientists can learn a lot to help us by studying the earths crust. For
example earthquakes and there patterns. This can help them predict frurther earthquakes and where they might happen. Based on this information they can build safer buildings and be better prepared.



Geologists know a lot about the earth by studying seismic waves. The waves are caused by earthquakes. These waves travel through
the earths layers. Thats how geologists know what the layers are made of.

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jellyfish
09/12/2012 5:58pm

I think it is important becace there would not be any earthquake warnings. Also so people will not dig down too far. I think scientists know the layers of the earth by scanning it. Also they study seismic waves.

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Basilisk
09/13/2012 12:53pm

I think it is important for scientist to understand the layers of the earth so that they can learn more about how gravity and things work like why plants still grow even though it is so hot under the surface, what creates the earths gravity, why does it take 365 1/4 days to make a full rotation around the sun and/or why it takes approximately 29 1/2 days for the moon to go through all of its forms like a crescent moon for example or say a full moon.

The main method used in order to examine the inner Earth is called seismic tomography, in which researchers use P- and S- waves created during earthquakes to plot (graph) the various layers. The speed of these waves, as well as the existence of “shadow zones,” show us both the composition (what something is composed or made of) and viscosity (viscosity is how thick and sticky something is) of the layers, for example, S-waves cannot travel through liquid. When researchers analyze S-waves traveling through the earth during an earthquake, they see that S-waves do not pass through the core, leaving a “shadow” on the other side. This is known as a “shadow zone,” and seeing this tells us that at least part of the core is liquid, or acts like a liquid.

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Tiger
09/13/2012 1:30pm

Hi Everybody,

1.Why do you think it is so important for scientists to understand the layers of the Earth?

I think that it is so important for scientists to know about the layers of the earth because then they can protect from natural disasters. Scientists know that the crust (which is the part of the earth we live on) is made of tectonic plates. By knowing this scientists can figure out where earth quakes are likely to happen. They can also figure out when earthquakes are going to happen.



2.If no one has traveled to Earth's core, how do we know so much about it?
Scientists have been studying seismic waves. Seismic waves are made out of energy from earthquakes. In the article it talks about how scientists have been watching the waves. Seismic waves travel through earth. At different points of the earth the waves go slower or faster. When they go slower they are probably in an area made of rock. When the waves go faster they are in a area that is made of the liquid iron.


:)Thanks for listening:)

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iguana
09/13/2012 1:33pm

Answer #1
It is important that scientists know the layers of the earth because we could know were the good minerals are. If we didn't know we would just have to guess were to find iron ore.
Answer #2
We know about the layers of the earth so much by studying seismic waves that happen in the dirt. We do this by studying the speed it moves in a certain layer.

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Duck
09/13/2012 1:37pm

Even though, no one has been to the inner core, the scientists know about it from studying seismic waves. These waves appear when there are earthquakes. These waves move through the different layers of the earth. Sometimes the waves move slowly and sometimes they move quickly. Also, we know about other layers, and sometimes knowing about the other layers, helps us know about the inner core. When there is a volcano, I wonder if the inner layers of the earth come up because it is hot molten rock.

I think it’s important for scientists to know about the earth and its layers because by studying more about the earth’s layers, we will know more about the earth that we live on. Sometimes scientists can predict earthquakes and volcanoes that might be coming. If we know this information, we can move to a safer place. Part of our earth is also studying the crust we live on. It is important to study our mountains and streams and oceans and lakes so that we know that their safe for us to be in too.

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Porcupine
09/13/2012 1:37pm

AJust like it's important to know where we live, it's also important to know what lies beneath our feet. Part of the reason that it is so important for scientists to know, is so that we can study what happens to it under certain circumstances, like earthquakes. Earthquakes can destory buildings, kill people, and leave many homeless. If we didn't know what caused earthquakes, we would be in even more danger. Another thing we need to know about is why the continents always move. This is called continental drift. Continental drift is what happens when tectonic plates shift place. It is important to know about that because if we look back on historic records, we realize that the continents separated from one big continent to several.

How do we know so much about the layers of the earth, when we can't drill more than 7 miles deep? Well, there is something called seismic waves. Seismic waves are the waves that come right after earthquakes. They are caused by the energy that travels through the earth's layers. The energy moves slower through some layers and faster through others. Also geologists know that some layers are made of liquid metals and others are hard rock.
I'm glad that I'm given the chance to learn all about the earth!

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goldfish
09/13/2012 1:40pm

I think it is important for scientists to understand the layers of the earth because if we ever find a way to go to the earth’s core, we know facts about the earth. It would be important to know were we are and how hot it is. Another reason is it is a window into the past and how our planet was formed. It also can give us reasons about plate shifting and other weather conditions.

The reason that we know so much about the layers of the earth is from studying seismic waves. They are waves of energy, usually from earthquakes. When they travel through the Earth, the waves move faster through some layers and slower through others. That is how people know that some layers are made of liquid metal and they know others are solid rock. They usually are a result of an earthquake, explosion, or a volcano.

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Howler Monkey
09/13/2012 2:05pm

It is very important that the scientist to understand the layers of the earth because, it is our home planet and we all should know what it is made of. By researching all about earth we might be able to know more about how the planet started out as, I do not think it always looked like it does today. If we knew how earth began that would help us find out how other planets started out as. I bet that the scientist love to do their work, and love finding out more about the earth’s layers.
Even though nobody has traveled to the Earth’s core, we know tons of fun facts about it. That is because scientists use various tools while they work on discovering the different layers of our earth. Since you can’t travel in to the earth’s core to explore it scientists use the next best thing Seismic waves these waves are caused by earth quakes or man-made explosions. I think that seismic waves are so cool. I mean who would think that they have technology like that? The waves start at the inner core. That is why we know so much about the earth’s layers.

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Falcon
09/13/2012 2:06pm

It is important for scientists to understand the structure each of the earth's many layers for many reasons. The Mantle because it is responsible for tectonic shift. The inner and outer cores because the outer core orbiting around the inner core it what makes earth's powerful magnetic field which causes our vital gravity.
The reason we know so much about the layers is because scientists study immensely the seismic waves as they pass through the earth/layers. The waves pass faster or slower through some layers. That is how we know that some layers are made of molten rock and that some are made of solid iron and nickel.

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racoon
09/13/2012 2:14pm

I think it's so important for scientist to know about he layers of the earth. One reason is because if the earths crust was a couple hundred feet they would have to be carful when they drill. Otherwise it would be a disaster who knows what would happen. Water goes into the mantle or the magma comes on the crust and destroys a bunch of houses. Another reason why its important is just in case they can give us info.
Maybe they don't know and just guess its their. Or maybe they they can tell from space about the interior. Just by the shape of the countries and bodes of water. And maybe they will make a robot that can sustand the heat but hats a long time from now.

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kangaroo
09/13/2012 2:45pm

It is important for scientist to know about the layers of the eart because than they know what is under the crust. they also need to know about the layers of the earth to understand the earth and what the earth is made of

we know a lot about the earths core because scientist use seismic rays to figure out what the core is made out of. because people cant go to the core it is way to hot down there

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rhino
09/13/2012 4:14pm

It is important for scientists to understand the layers of the earth because they greatly affect the surface of the earth. For example, tectonic shift. Now scientists know that the continents won’t always be where they are now. They’re constantly moving. Now, some scientists are actually using lasers and satellite systems to predict how faults are moving. Then, they can prepare places for possible earthquakes in the future.
We know a lot about the earth’s core because of seismic waves. Seismic waves are waves of energy from earthquakes that change direction and speed according to what material they’re passing through. Scientists study these waves to learn about the earth’s interior. Another thing they study is earth’s magnetism, since the inner and outer cores create it.


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bird
09/13/2012 5:07pm

understanding the layers of the earth can help scientists to figure out why volcanoes erupt, why earthquakes can occur and where fault lines are where they mostly happen. And also why there's a magnitude source around earth. The way they know so much about it is because they have detectors that show you what and where the layers are. The only way the scientists would have come up with this idea would be for it to start out with a theory, and the detectors only proved them right.

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Zebra
09/13/2012 5:27pm

1. The reason why it is important to know about the layers of the earth is because, all plates are driven by the crust floating on molten mantle. Also you want to be able to understand when earthquakes happen. Also to understand the plate tectonics.

2. The reason why we know so much about earths core is because, geologist have been studying seismic. Also because when they travel through earth, the waves moved. More quickly to, plus while doing that there going through some layers slowly through others. Also they know that some layers are made of liquid metal such as iron.

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wombat
09/13/2012 5:29pm

I think that scientists all over the world think that the earths layers are important because if some one drilled a hole to the center of the earth they would burn up and die. So now that we know that mistake can not be made again.

scientists believe that the inner core is made of iron ore because of the earths magnetism and play tectonics.

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09/13/2012 5:30pm

I think that is important that scientists understand the layers of the earth because then they can know more about the earth in order to study it.They can also understand different temperatures to know what goes on underneath the earth's crust.
I am not so sure how we know about the earth's layers if no one has ever traveled to the center of the earth. Actually, that was going to be MY question in class. I wonder if knowing the layers of the earth goes back to the scientists knowing and they passed it on to the rest of the humans.
Another Question: How come if we know the layers of the earth, then we don't know the layers of other planets such as; Mars , Venus , Saturn, and other planets?
Conclusion: I guess we have to travel to other planets more to find out probably the way we did with this planet.
Bye!!!!!!!

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muskrat
09/13/2012 5:34pm

i think it is important because if an explosion happend in the middle of the earth we wouldn't know what it was. also because if there's a active volcano we wouldn't know where the lava came from. also i think if we didn't know about the layers of the earth we wouldn't know if we tried to dig we would get burned up.

we know so much because there is thermal images. also because a lot of technology and technology has grown so much over the years. also there is no right or wrong answer because nobody really knows.

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platypus
09/13/2012 5:51pm

It is important for scientists to understand the layers of the earth so they can estimate the next earthquake, tsunami, or other natural disasters. Also so we can find water, limestone, and other natural resources. Plus scientists can find out about our earth’s history.
They would do that by drilling deep into the earth and removing cores and studhying them to see the layers. Another tool they use is a seismograph that measures movement under the earth’s plates.

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Mockingjay
09/13/2012 6:43pm

I think that it's important for scientists to know about the layers of the Earth because then humans can find out more about the Earth. One of those important things are the cause of tsunamis and earthquakes. Underneath the thick-green grass and the dazzling-blue waters are tectonic plates (the crust). When one plate slides on to another plate, that creates a tsunami and an earthquake (a tsunamis is under water and an earthquake is under land). Due to the fact that we know about the Earth's layers, we understand the cause of a tsunami and an earthquake. That's one of the reasons why I think it's important for scientists to know about the layers of the Earth.
I think the reason why people know so much about the inner core is because they research different facts from different resources. One way that scientists know about the inner core is seismic waves (which are caused by explosions or man-made explosions). Scientists are able to measure seismic waves as they pass through the Earth. Based on the size and shape of the waves, geologists are able to determine what the inner core is made of and/or looks like. Another way to find out about the inner core is at Earth’s magnetic fields. That’s how scientists know about the inner core.

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Koala
09/13/2012 6:57pm

Why is it important for scientists to understand about layers of the earth? I think it is important for scientists to understand about layers of the earth because it helps people understand how compasses and the earths magnitisim work and it can help us understand how the earth was formed.


If no one has travled to the Earth's core how do we know so much about it.we know so much about the earths core because of sismic waves. Sismic waves are waves of energy caused by earthquakes as the waves move through the earth they move slowly through some layers and faster through others this way they can tell if some layers are made of liquid metal.

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Horse
09/13/2012 7:12pm

I think it is important that scientist know the layers of the earth because, it helps us understand our planet better. I mean that by, that we can understand natural disasters, for example: volcanoes, since scientist know the layers of the earth they know that what lava is because they have studied that it has came out of the mantle, one of the layers of the earth. They also know how earth quakes are created because the crust is not one whole piece but different pieces that can be layered on each other known as the Tectonic Plates. It also helps to understand minerals, and other things.
We know so much about the earth’s layers because we can tell by waves. The earth sends Seismic waves that can determine what material is in the earth. Seismic waves are energy waves that sometimes can cause earthquakes. Through these waves we can get an idea of what is under the crust.

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blue jay
09/14/2012 3:59am

1. Scientist are problem solvers, their believes are based on facts and also hypothesis. Based on the reading it is important for the scientist to learn about the layers of the earth so they get a better understanding on how the earth’s crust’s shift. My understanding of the first question, scientists learn about the earths crust and their movements so we could understand and try to prepare for future seismic activities.


2. Since we’ve never drilled to the earth’s core. Scientists have an idea of how the core is formed by the seismic waves. That's how we know so much about it.

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Timber Wolf
09/27/2012 4:32pm

1) Scientists believe in fact, but sometimes they must use both facts and hypothesizing. Upon reading the article, i conclude that the knowing of the Earth's layers is important so that they can have a better understanding about how tectonic plates shift. I think the 1st question is to prepare for future seismic occurrences in the earth.

2) The geoligists know so much about what is below the crust of the earth because they study seismic waves, which are waves of energy caused by earthquakes. We've never drilled all the way into the earth, so we study the energy to know a lot about the inside of the earth.

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mouse
09/27/2012 6:12pm

I think that its important that scientists know the layers of the earth so its one less mystery for life. So people can know exactly
what the world is , what it is made of, what people can find under neath us. Miners can know how far to dig to not hit lava.

we really dont know its just that scientists inferred whats inside the earth from events like erations,earth quakes, sunamies and so much more. So no one really knows whats inside the earth.

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