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Definition
| ocean curst is made of this |
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Term
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Definition
| Continental crust is made of this rock |
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Definition
| the outer layer of rock on Earth |
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Definition
| The layer of hot rock below the crust. It contains both the lithosphere and asthenosphere. |
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Definition
| The rigid layer of the uppermost part of the mantle. Hint: jolly ranchers |
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Definition
| The layer of the mantle below the lithosphere. It is soft and the lithosphere floats on it. |
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Definition
| Layer of molten (melted, liquid) metal that is below the mantle. |
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Definition
| A dense ball of solid metal located at the center of the earth. |
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Definition
| A break in the Earth's crust where rocks have slipped past each other. |
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Definition
| The place where two plates move apart. |
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Term
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Definition
Place where two plates come together.
If the coean meets continent=ocean sinks in trench (this is subduction).
When a continent meets another continent=mountains. |
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Term
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Definition
| Measure of how much mass there is in a volume of substance. |
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Definition
e
Two plates slip past each other in opposite directions. Earthquakes frequently occur here. |
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Term
| Alfred Wegener's Theory of Continental Drift |
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Definition
All of the continents had once been joined together and
have since drifted apart.
Scientists rejected his theory because he couldn't explain what force moved thee continents.
Scientists now believe earth's crust moves because of the convection currents in the athensophere. |
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Term
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Definition
| The supercontinent that began to break apart about 225 million years ago. |
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Definition
The process that continually adds new material to the ocean floor.
As ocean crust moves away from the mid-ocean ridge, it cools and becomes more dense. |
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Term
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Definition
| The process by which ocean crust sinks beneath trenches. |
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Term
| Evidence for continental drift: |
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Definition
Landforms
Fossils
Climate |
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Term
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Definition
| Longest chain of mostly underwater mountains in the world. |
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Definition
| forms where ocean crust bends downward. This is where subduction takes place. |
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Term
| What two layers do convection currents occur in? |
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Definition
| The mantle and outer core |
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Term
| What are the four main layers of the Earth in order? |
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Definition
Crust
Mantle
Outer core
Inner core |
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Term
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Definition
| Is where sea floor spreading takes place. |
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