Minerals, Rocks & Fossils
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23 terms
Terms | Definitions |
|---|---|
 Properties | Scientists can tell a mineral by its ___________. |
| Hardness, color and shape | Some properties of minerals are ___________, ____________ & ____________. |
| Salt | A type of mineral that we eat. |
| Diamonds | A type of mineral that we wear (Jewelry). |
| Graphite | A type of mineral that we use to write. |
| Iron | Used in things like ships, cars and buildings |
| Wood & Graphite | Pencils are made out of _________ & ___________. |
| Rocks | The Earth is made mostly of ____________. |
| Crust, Mantle & Core | The 3 layers of the Earth are: |
| Crust | The outside layer of the Earth made of solid rock. |
| Mantle | The middle layer of the Earth made of soft rock. |
| Core | The center of the Earth that is made of solid and liquid iron. |
| How they form | Rocks are grouped by ________ _________ __________. |
| Igneous Rocks | Formed from melted rock that has cooled and hardened. |
| Sedimentary Rock | Formed when wind and weather break down rocks and the particles pile up in layers. They press together to become solid rock. |
| Metamorphic Rock | Rock that was once igneous or sedimentary, but has changed from heat and pressure. |
| True | True/False: All rocks can be changed from melting, heat and pressure, and the effects of wind and water. |
| True | True/False: Fossils can show the shape of an animal that lived long ago. |
| Because what's left of a plant or animal is trapped in the sediments that form the layers of the rock. | Why do sedimentary rocks usually have more fossils? |
| A mold | The shape of a plant or animal left in sediments when the rock formed. |
| A cast | Has the exact shape of the animal that made the mold. |
| It is formed when mud or minerals fill a mold. | How is a cast formed? |
| By looking at the shape of their teeth | How can scientists tell what kind of food dinosaurs ate? |
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