The entire crust and the upper part of the mantle.
200
This layer makes up most of the Earth's mass
mantle
200
Are volcanoes and earthquakes related to one another in any way?
Yes. They often happen in the same area on plate edges. Also an earthquake is likely to occur just below a volcano before it erupts.
200
What do you call the area on the surface of earth where all the damage occurs during an earthquake?
Epicenter
200
Explain in detail one piece of evidence that Wegener used to help prove that the plates move.
Fossils, Puzzle pieces, rock layers
200
What is a plate boundary?
The area where plates meet.
300
Pressure is the greatest in this layer.
inner core
300
Where do volcanoes form?
Plate edges and hotspots.
300
What does the "magnitude tell you about an earthquake?
How strong it is.
300
Explain what plate tectonics are.
The movement of plates that cause the earth's surface to change and form new land forms.
300
Describe in DETAIL what happens to temperature as you travel from the surface of the crust to the inner core.
The temperature decreases as you move into the crust for a short time. Then the temperature increases until you reach the core.
400
Which layer is completely liquid?
Outer Core
400
In general how to volcanoes form?
Magma coming to the surface and cooling to form rock.
400
What is the underground point of the earthquake called?
focus
400
Explain two land forms other than volcanoes that are formed by plate movement and how the plates move to form them.
trenches- plate sinking under another
mountain- plates pushing against one another
rift valley or ridge- two plates pulling apart.
400
What happens to pressure as you move from the core to the crust?
It decreases
500
How thick is the crust?
5-70km
500
What is the difference in formation between a plate edge volcano and a hotspot volcano?
Plate edge: magma seeps through the cracks and forms a volcano.
Hotspot: In incredibly hot and high pressure spot of magma melts a hole directly through a weak area of crust.
500
How do earthquakes happen?
Two plates become stuck on one another. Pressure builds until finally the plates SUDDENLY slips past each other. This sudden movement causes an earthquake.
500
Explain what cause the plates to move. What is it called and how does it work.
Convection currents. Heat at the core warms molten rock. the molten rock rises towards the crust and spreads out. When it spreads it pulls continents along with it. The molten rock then cools and sinks back to the core. The process begins again.