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Earth's Structure
Geology
| Question | Answer |
|---|---|
| The Crust is made up of... | solid rocks, soil,and minerals |
| The Mantle supports the... | crust |
| Inner Core is shaped... | like a solid ball |
| Inner Core is made of... | mostly of solid iron and nickel |
| The Outer Core is made of... | mostly of melted iron |
| The Outer Core is... | thought to be liquid |
| Scientists call the earth's crust and upper mantle | the lithosphere (litho means rock or stone) |
| The two types of crust are... | oceanic crust and continental crust |
| The three layers of the mantle are... | lithosphere, asthenosphere, and mesosphere |
| The two layers of the core are... | The outer core and the inner core |
| The earth's crust is the thickest... | on continental crust, specifically at mountain ranges |
| The thickest layer of the earth is the... | mantle |
| The thinnest layer of the earth is the... | crust |
| Convection currents are found in the... | mantle (primarily in the mesosphere) |
| Convection currents are responsible... | for the movement of heat through the mantle |
| The earth's three main layers are the... | crust, mantle, and core |
| Oceanic crust is made of... | mostly basalt |
| Continental crust is made of... | mostly granite |
| Convection currents in the outer core are thought to be responsible for... | the earth's magnetic field |
| Is the mantle a solid or a liquid? | solid |
| Which layer of the mantle separates the upper mantle from the lower mantle? | asthenosphere |
| Continental drift | the theory that the continents are moving very slowly. |
| Alfred Wegener proposed the theory of... | continental drift |
| Pangaea | an ancient supercontinent that scientists believe existed from about 200 to 300 million years ago. |
| Supercontinent | a single landmass that includes two or more continents. |
| Landmass | a large, unbroken area of land. |
| Fossil | the remains, traces, or imprint of an ancient living thing preserved in rock. |
| Fossils can be... | bones, shells, impressions, or even footprints. |