3561509
Description
Flashcards by Angelique Colby, updated more than 1 year ago
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Created by Angelique Colby
about 9 years ago
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| Question | Answer |
| atmosphere | the layer of gases that surrounds the earth and protects it from too much sunlight |
| lithosphere | rocks, plants, and minerals make up this layer |
| the crust | the outer part of the lithosphere |
| people build homes and cities on this layer | lithosphere |
| Earth's lithosphere contains | rocks, soil, and minerals |
| the center layer of the earth | core |
| core | center layer of the earth, made up of solid, very hot metals |
| mantle | layer below the crust, partly solid and partly semi-solid |
| What did early geographers notice in the 1500s? | the continents fit together like puzzle pieces |
| plate tectonics theory | says that the earth's surface is made up of about 20 moving plates |
| how continents move | explained by plate tectonics theory |
| Plate movement causes what? | earthquakes, mountains, and volcanoes |
| weathering | breaking down or physically changing rock |
| When does water cause physical weathering? | Breaks a rock into pieces by expanding when it freezes |
| hypothesis | a guess or idea |
| scientific theory | plate tectonics |
| igneous rock | when melted mantle cools |
| metamorphic rock | igneous or sedimentary rock that has been changed by heat or pressure |
| sedimentary rock | sand grains that have been cemented together |
| sand | occurs when weathered, igneous rock breaks down |
| delta | new land formed at the mouth of a river by deposition |
| fossil | the remains of any organism |
| the rock cycle | the process of how rocks change form |
| erosion | caused by strong winds or water |
| 4 spheres | 1. biosphere - all living things 2. atmosphere - gases around Earth 3. hydrosphere - water on and around earth 4. lithosphere - layer of rocks, soil, and minerals |
| Pangea | supercontinent that existed millions of years ago; split apart into seven continents through plate movement |
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