Term
| What are tectonic plates? |
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Definition
| The semisolid rock beneath the crust. |
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Term
| What are the light, thick plates called? |
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Definition
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Term
| What are the thin, heavier plates called? |
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Definition
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Term
| What is the movement of plates called? |
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Definition
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Term
| What can continental drift do? |
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Definition
| Push plates together and apart. |
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Term
| How is continental drift caused? |
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Definition
| Due to the movement of the magma beneath the plates. |
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Term
| How is the movement of the magma caused? |
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Definition
| The movement of the magma is caused by convection currents generated by the immense heat at the Earth's core |
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Term
| What are the edges where the plates meet called? |
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Definition
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Term
| What are the four types of plate boundary? |
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Definition
| Constructive destructive conservative (or sliding) and collision. |
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Term
| What is the first feature of a constructive plate boundary? |
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Definition
| At a constructive plate boundary two plates move apart. |
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Term
| What is the second feature of a constructive plate boundary? |
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Definition
| Magma rises to the surface, due to gas bubbles in the magma that make it lighter than the surrounding rock. |
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Term
| What is the third feature of a constructive plate boundary? |
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Definition
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Term
| What is the fourth feature of a constructive plate boundary? |
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Definition
| Gentle eruptions occur which may continue for years. |
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Term
| What are features of most constructive boundaries? |
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Definition
| They are under the sea and the form chains of volcanic islands. |
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Term
| What is a famous constructive plate boundary? |
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Definition
| The Mid-Atlantic Ridge is the most famous. |
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Term
| What is the first feature of the destructive plate boundary? |
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Definition
| At a destructive plate boundary, and oceanic and continental plate collide. |
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Term
| What is the second feature of the destructive plate boundary? |
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Definition
| The heavier oceanic plate sinks under the continental plate into what is known as a subduction zone. |
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Term
| What is the third feature of the destructive plate boundary? |
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Definition
| The melted crust rises (due to the gas bubbles in the magma that make it later than the surrounding rock) to form explosive, dangerous and volcanoes. |
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Term
| What is the fourth feature of the destructive plate boundary? |
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Definition
| When the two plates rub together, friction occurs, leading to earthquakes. |
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Term
| What is the most famous destructive boundary? |
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Definition
| The most famous destructive boundary is the Pacific Ring of Fire, which forms a band of earthquakes and volcanoes round the edge of the Pacific Ocean. |
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Term
| What was the cause of this Soufriere Hills volcano, Montserrat? |
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Definition
| A destructive plate boundary. |
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Term
| What is the first feature of a Conservative (or sliding) plate boundary? |
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Definition
| At a conservative plate boundary, two plates slide past each other. |
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Term
| What is the second feature of the Conservative (or sliding) eight boundary? |
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Definition
| The plates become locked and tension builds up over years. |
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Term
| What is the third feature of the Conservative (or sliding) boundary? |
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Definition
| Eventually the plates for jolt past each other, causing powerful earthquakes. |
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Term
| What is the fourth feature of the Conservative (or sliding) plate boundary? |
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Definition
| Volcanic activity does not occur. |
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Term
| What is the most famous conservative (or sliding) plate boundary? |
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Definition
| The most famous of these is the San Andreas fault. |
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