Term
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Definition
| Divergent plate boundaries |
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Term
| The theory of a SUPERCONTINENT is called |
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Definition
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Term
| This is where plates are moving apart |
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Definition
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Term
| A volcano that is large and has non-violent eruptions is... |
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Definition
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Term
| Lava hardens quickly on earth's surface because... |
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Definition
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Term
| This is the plate boundary where new crust is being formed. |
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Definition
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Term
| What is a factor that makes a volcanic eruption loud and violent? |
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Definition
| The more dissovled gas in the magma. |
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Term
| The idea that continents move through the sea floor is called... |
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Definition
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Term
| Compared to continental plates, ocean plates are.. |
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Definition
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Term
| The smallest volcano cones. |
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Definition
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Term
| This island is at the top of the mid Atlantic Ridge. |
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Definition
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Term
| Earthquakes happen when rocks under pressure do what? |
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Definition
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Term
| What type of plate boundary is the San Andreas Fault? |
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Definition
| Transform plate boundary fault |
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Term
| Where are the hottest crust temperatures found? |
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Definition
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Term
| As we go deeper into earth's crust, the temperature goes... |
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Definition
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Term
| What type of earthquake waves compress and stretch rocks? |
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Definition
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Term
| True or False: We can predict major earthquakes days or weeks in advance. |
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Definition
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Term
| True or False: Faults that do not seem active should be considered safe for building on. |
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Definition
| False. Faults are building up pressure all the time which could let loose and create a very large earthquake. They never stop moving. We don't know when one will happen. |
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Term
| If the Pacific Plate would stop moving, what would happen to Hawaii? |
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Definition
| Hawaii would keep getting bigger because it would stop on top of a hot spot. |
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Term
| Why do many volcanoes and earthquakes happen near ocean trenches? |
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Definition
| Trenches are near Subduction zones. The ocean plate goes under the land. Volcanos form as ocean crust is melted and bubbles up. Earthquakes happen when rocks and plates move. |
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Term
| How many times more powerful is a 7 magnitude quake than a 5 magnitude quake? |
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Definition
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Term
| How many more times is the largest wave of a 7 magnitude quake than a 5 magnitude quake? |
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Definition
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Term
| What are the three types of waves that are produced by an earthquake? |
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Definition
| P-waves, S-waves, and L-waves |
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Term
| Describe how the three types of earthquakes move. |
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Definition
Primary waves push and pull as they travel through the earth.
Secondary waves move up and down as they travel throught the earth.
Surface waves move along the surface. They cause the most damage. |
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Term
| Is an earthquake's focus always on a fault? What about the epicenter? |
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Definition
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Term
| What happens to the difference in arrival times between P and S waves as we get futher away from an earthquake? |
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Definition
| P-waves will get there faster. |
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Term
| What factors make an explosive volcano? |
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Definition
1) the amount of dissolved gasses
2)Water
3)Cilicone |
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Term
| Contrast ocean and continental crust. |
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Definition
| Ocean crust is thinner than continental crust and it is more dense than continental crust. |
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Term
| Name two pieces of evidence for plate tetonics. |
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Definition
Wegener observations: it looks like all of the continents fit together.
Fossil clues:similar fossils were on South America and Africa.
Rock layers: extentions of Mt. ranges. |
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Term
| What are the three types of plate boundaries and how do they move? |
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Definition
Convergent: Moves together
Divergent: Moves apart
Transform: Slides to the side |
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Term
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Definition
| They are places where divergent boundaries seperate and new crust is being formed. |
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Term
| What is going on with the plates involved with the Himalayan mountains? |
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Definition
| They are are found on convergent plate boundaries. This pushes them up and forms mountains. |
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