Minerals, Rocks and Fossils
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21 terms
Terms | Definitions |
|---|---|
 Mineral | an object that is solid, is formed in nature, and has never been alive. |
| Rock | a solid made of minerals |
| Crust | The outside layer of Earth |
| Mantle | The middle layer of Earth |
| Core | The center of Earthq |
| 3 properties of minerals | hardness, shape and color. |
| 3 ways minerals are used | (1)to season food, (2) to stay healthy and (3) to make products |
| Graphite | a mineral that is the main ingredient in pencil lead. Without it, pencils would have to made from something else. |
| Iron | used to build buildings, ships and cars. |
| Middle layer | is the mantle and is a thick layer of soft, hot rock. |
| The center of the earth | is made of very hot iron:some liquid, some solid. |
| Igneous Rock | a rock that was once melted but has cooled and hardened. |
| Sedimentary Rock | a rock formed from material that has settled into layers and has been squeezed until it hardens into rock. |
| Metamorphic Rock | a rock that has been changed by heat and pressure |
| Rock Cycle | the process in which one type of rock changes into another type of rock. |
| How rocks are grouped | by how the rock is formed |
| 3 types of rocks | igneous, sedimentary, and metamorphic |
| Fossil | something that has lasted from a living thinkg that died long ago. |
| Mold | shape of a plant or an animal left in sediments when the rock is formed. |
| Cast | is formed when mud or minerals fill a mold. It has the exact shape of the plant or animal in the mold. |
| Fossil imprints | molds of leaves or other thin objects such as wings or feathers. |
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