7.3.2 Practice
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maddro...@gmail.com
Dec 3, 2012, 9:33:29 AM12/3/12
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7.3.2 Practice: Chronic Tectonics Practice Assignment
Earth Science (S1392846) Kristina McClamrock
Answer the following questions thoroughly.
1. Draw a diagram of Earth that labels its mechanical layers on one side and its composition layers on the other side. (7 points)
Drawn on a seperate piece of paper.
2. Fill in the table with information about the different types of boundaries. (8 points)
Table filled in on a seperate piece of paper.
3. There are alternate explanations for the forces behind plate movement.
A. What is "slab-pull"?(4 points)
Gravity pulls down subducting crust, which pulls the crust along with it.
B. What is "slab-push"? Give one example of a slab-push structure. (4 points)
Magma pushes it's way up to the crust, which pushes the crust apart.
Example: There were slap-push earthquakes along Mexico and Chile.
C. Which is the stronger force behind plate movement? (2 points)
Slab-Pull
4. Volcanoes are usually found near subduction zones.
A. Why do you usually find volcanoes near subduction zones? (5 points)
Well subduction zones are usuall found near convergent boundaries, which is a slab-pull. Near these zones magma is brought up from the Earth, thus creates a volcanoe.
B. Draw a diagram to assist your explanation. Make sure you label crust, subduction zone, magma, volcano, and the direction of plate movement. (5 points)
Drawn on a seperate piece of paper.
5. What are four pieces of evidence Alfred Wegener used to support his theory of continental drift? (4 points)
Shape of continents, fossil evidence, glacial evidence and similar rocks found in different continents.
6. Wegener’s theory of continental drift was not accepted by all scientists.
A. What was the main counterargument against Wegener's evidence? (2 points)
He couldn't explain the mechanism that moved the continents across the sea floor.
B. What information did Wegener not have that would have strengthened his argument? (3 points)
If he knew the mechanism that moved the continents across the sea floor.
7. It is thought that all the continents used to be part of one super-continent.
A. How did a super-continent form? (2 points)
The land was stuck together, making a big Pangea. It formed because all the plates were shifted together.
B. What caused it to break up after it formed? (4 points)
The plates shifted away from each other, forming seperate continents.
Sources: Apex
Earth Science (S1392846) Kristina McClamrock
Answer the following questions thoroughly.
1. Draw a diagram of Earth that labels its mechanical layers on one side and its composition layers on the other side. (7 points)
Drawn on a seperate piece of paper.
2. Fill in the table with information about the different types of boundaries. (8 points)
Table filled in on a seperate piece of paper.
3. There are alternate explanations for the forces behind plate movement.
A. What is "slab-pull"?(4 points)
Gravity pulls down subducting crust, which pulls the crust along with it.
B. What is "slab-push"? Give one example of a slab-push structure. (4 points)
Magma pushes it's way up to the crust, which pushes the crust apart.
Example: There were slap-push earthquakes along Mexico and Chile.
C. Which is the stronger force behind plate movement? (2 points)
Slab-Pull
4. Volcanoes are usually found near subduction zones.
A. Why do you usually find volcanoes near subduction zones? (5 points)
Well subduction zones are usuall found near convergent boundaries, which is a slab-pull. Near these zones magma is brought up from the Earth, thus creates a volcanoe.
B. Draw a diagram to assist your explanation. Make sure you label crust, subduction zone, magma, volcano, and the direction of plate movement. (5 points)
Drawn on a seperate piece of paper.
5. What are four pieces of evidence Alfred Wegener used to support his theory of continental drift? (4 points)
Shape of continents, fossil evidence, glacial evidence and similar rocks found in different continents.
6. Wegener’s theory of continental drift was not accepted by all scientists.
A. What was the main counterargument against Wegener's evidence? (2 points)
He couldn't explain the mechanism that moved the continents across the sea floor.
B. What information did Wegener not have that would have strengthened his argument? (3 points)
If he knew the mechanism that moved the continents across the sea floor.
7. It is thought that all the continents used to be part of one super-continent.
A. How did a super-continent form? (2 points)
The land was stuck together, making a big Pangea. It formed because all the plates were shifted together.
B. What caused it to break up after it formed? (4 points)
The plates shifted away from each other, forming seperate continents.
Sources: Apex
Williams, Sue
Jan 6, 2013, 7:43:54 AM1/6/13
to plc-eart...@googlegroups.com
37 points
4 points
4 pointw
2 pointw
3 points
4 points
2 points
2 points
2 points
2 points
On Mon, Dec 3, 2012 at 9:33 AM, <maddro...@gmail.com> wrote:
7.3.2 Practice: Chronic Tectonics Practice Assignment
Earth Science (S1392846) Kristina McClamrock
Answer the following questions thoroughly.
1. Draw a diagram of Earth that labels its mechanical layers on one side and its composition layers on the other side. (7 points)
Drawn on a seperate piece of paper.
2. Fill in the table with information about the different types of boundaries. (8 points)
Table filled in on a seperate piece of paper.
3. There are alternate explanations for the forces behind plate movement.
A. What is "slab-pull"?(4 points)
Gravity pulls down subducting crust, which pulls the crust along with it.
4 points
B. What is "slab-push"? Give one example of a slab-push structure. (4 points)
Magma pushes it's way up to the crust, which pushes the crust apart.
Example: There were slap-push earthquakes along Mexico and Chile.
4 pointw
C. Which is the stronger force behind plate movement? (2 points)
Slab-Pull
2 pointw
4. Volcanoes are usually found near subduction zones.
A. Why do you usually find volcanoes near subduction zones? (5 points)
Well subduction zones are usuall found near convergent boundaries, which is a slab-pull. Near these zones magma is brought up from the Earth, thus creates a volcanoe.
3 points
B. Draw a diagram to assist your explanation. Make sure you label crust, subduction zone, magma, volcano, and the direction of plate movement. (5 points)
Drawn on a seperate piece of paper.
5. What are four pieces of evidence Alfred Wegener used to support his theory of continental drift? (4 points)
Shape of continents, fossil evidence, glacial evidence and similar rocks found in different continents
4 points
6. Wegener’s theory of continental drift was not accepted by all scientists.
A. What was the main counterargument against Wegener's evidence? (2 points)
He couldn't explain the mechanism that moved the continents across the sea floor.
2 points
B. What information did Wegener not have that would have strengthened his argument? (3 points)
If he knew the mechanism that moved the continents across the sea floor.
2 points
7. It is thought that all the continents used to be part of one super-continent.
A. How did a super-continent form? (2 points)
The land was stuck together, making a big Pangea. It formed because all the plates were shifted together.
2 points
B. What caused it to break up after it formed? (4 points)
The plates shifted away from each other, forming seperate continents.
2 points
Sources: Apex
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