Term
| What are the layers of the earth? |
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Definition
Crust - Oceanic, continental
Mantle - lithosphere,asthenosphere, mesosphere
Core - Outer, Inner |
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Term
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Definition
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Term
| What is the state of matter for each layer? |
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Definition
Crust - solid
Mantle - plastic
Outer Core - liquid
Inner Core - solid
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Term
Compare lithosphere and inner core
Density
Temperature
Pressure |
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Definition
Density: Inner Core is denser
Temperature: Inner Core is much hotter
Pressure: Inner Core has more pressure |
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Term
| What are convection currents? |
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Definition
| The circular motion in a liquid caused by heating and cooling. Hot rock rises and cold rock sinks. |
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Term
| What are tectonic plates? |
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Definition
| Plates in the lithosphere that move at plate boundaries. They are the plates in the theory of plate tectonics. |
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Term
| How do scientists know what's in the earth? |
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Definition
| Seismic waves from earthquakes. Some just make hypotheses due to clues on he surface. |
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Term
| Who is Alfred Wegener and what what evidence did he have for continental drift? |
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Definition
| He is the scientist who came up with the hypothesis of continental drift. Continents could somehow fit as a jigsaw puzzle. Some of the same fossils were found on different continents. |
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Term
| What happened to Pangaea after it broke apart? |
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Definition
| It split into Laurasia and Gondwana. Then, Eurasia was formed where present day Europe and Asia are. |
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