Earth's Layers
Earth's Plates
Volcanoes
Earthquakes
Miscellaneous
100
The innermost layer of the earth.
What is the Core?
100
This is the theory scientists use to explain plate movements.
What is Plate Tectonics?
100
The mountain formed when molten rock reaches Earth's surface through a vent.
What is a Volcano?
100
About 95% of all earthquakes occur at or near the edges of moving plates. These cracks are called this.
What is a Fault?
100
225 million years, this supercontinent was formed when all land masses were together as one.
What is Pangea?
200
This is Earth's thinnest layer.
What is the Crust?
200
Plates move away from each other along this boundary.
What is a Divergent Boundary?
200
This is molten rock beneath the Earth's surface?
What is magma?
200
This is the point in Earth's crust where the first major movement along a fault has occurred.
What is the Focus?
200
When magma slowly pushes through the ocean floor, forming a new layer.
What is Sea-Floor Spreading?
300
This layer ranges from 2,900 degrees to 7,200 degrees and is only partially melted.
What is the Mantle?
300
Plates collide along this boundary.
What is a Convergent Boundary?
300
This volcano is broad and slightly dome-shaped. They make up the world's largest volcanoes.
What is a Shield Volcano?
300
This wave causes back and forth vibrations in the same direction as the wave moves.
What is a P Wave?
300
This is the point directly above the focus (during an earthquake).
What is the Epicenter?
400
The core is about 10,000 degrees, but it is solid because of this.
What is Pressure?
400
Plates grind past each other on this boundary.
What is a Transform Fault Boundary?
400
More than a dozen volcanoes line the Pacific Ocean and Pacific Plate. This is the name for that circle of mountains.
What is the Ring of Fire?
400
This wave of an earthquake causes the most damage.
What is a Surface Wave?
400
The core is made up of mainly iron and this metal.
What is Nickel?
500
Plates float on this layer of weak, easily deformed rock.
What is the Asthenosphere?
500
This chain of mountains runs about 52,000 miles through all the world's oceans.
What is the Mid-Ocean Ridge?
500
This type of volcano does not form at the edges of plates. Instead, it forms over a narrow column of magma and then breaks through the earth's crust.
What is a Hot-Spot Volcano?
500
Scientists use this to measure the amount of energy released during an earthquake.
What is the Richter Scale?
500
This scale measures the amount of damage that an earthquake causes.
What is the Mercalli Intensity Scale?
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