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Eureka Review
Questions from Eureka Slides
| Question | Answer |
|---|---|
| What is erosion? | the moving of rock and soil that has been weathered |
| What are the 3 main forces of erosion on Earth? | wind, water and glaciers |
| What is weathering? | the breaking down of rock into smaller pieces |
| What causes weathering? | mechanical and chemical forces cause weathering |
| Weathering is important because...... | Weathering is important because it results in the formation of new soil |
| How are metamorphic rocks formed? | Igneous and sedimentary rocks that have been changed due to high temperature and pressure |
| How are sedimentary rocks formed? | Layers of rock fragments, soil and minerals get pressed together. (usually underwater) |
| How are igneous rocks formed? | Magma under the Earth's crust cools and solidifies |
| What causes volcanoes to form? | Molten (melted) material from inside the Earth escapes out an opening in the Earth’s crust. new layers cool and harden on top of old layers, forming a conical shape. |
| What causes earthquakes? | Stress builds up in the Earth’s crust due to the tectonic plates pushing on one another. |
| Why are oceans salty? | Runoff from minerals on land and decaying sea life |
| What percentage of the Earth is covered by water? | approximately 70-75% |
| Name the layers of the Earth from the outside in toward the center. | Crust, Mantle, Outer Core, Inner Core |
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barbzabel7
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