Term
| What happens during a continental drift? |
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Definition
| Continents slowly move across Earth’s surface. |
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Term
| Continents were once joined together 200 million years ago in a single landmass or super continent called what? |
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Definition
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Definition
| Preserved remains or traces of an organism that lived in the past. |
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Term
| What is a Mid Ocean Ridge? |
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Definition
| An undersea mountain chain where new ocean floor is produced. |
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Term
| What is the process by which molten material adds new crust to the ocean floor? |
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Definition
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Term
| Deep Ocean Trench is also known as what? |
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Definition
| A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle. |
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Term
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Definition
| The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary. |
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Definition
| A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust. |
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Term
| What is a Divergent boundary? |
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Definition
| A plate boundary where two plates move away from each other. |
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Term
| What is a Convergent boundary? |
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Definition
| A plate boundary where two plates move toward each other. |
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Term
| What is a Transform boundary? |
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Definition
| A plate boundary where two plates move past each other in opposite directions. |
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Term
| What is the theory called where pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle. |
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Definition
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Term
| What's another name for a break in Earth’s crust along which rocks move. |
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Definition
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Term
| What's another name for a deep valley that forms where two plates move apart. |
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Definition
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Term
| What do mid ocean ridges form? |
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Definition
| Long chains of mountains that rise up from the ocean floor. |
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Term
| What does sea-floor spreading do the ocean floor? |
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Definition
| It adds more crust to the ocean floor. At the same time, older rocks move away. |
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Term
| What process takes 10 million years? |
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Definition
| Part of the ocean sinks back into the mantle at deep ocean trenches. |
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Term
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Definition
| The layer of hot, solid material between Earth's crust and core. |
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Term
| What area of the ocean floor does Subduction take place? |
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Definition
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