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7th Grade Rocks
| Question | Answer |
|---|---|
| What is the difference between rocks and minerals? | The difference between the two is that minerals are considered to be the building blocks of rocks and rocks can be a combination of as many as six types of minerals. |
| How many types of rocks make up the Earth's crust? | Three types of rocks make up the Earth's crust. |
| What are the names of the 3 types of rocks? | The names are igneous, metamorphic, and sedimentary rocks. |
| How are igneous rocks formed? | Igneous rocks form when molten magma cools and solidifies. |
| What is another name for igneous rocks? | Sometimes they're called "rocks of fire." |
| What is the difference between two types of igneous rocks? | The difference is extrusive types form when molten rock comes to the surface and cools quickly as opposed to intrusive rocks, which solidified underground, cooling slowly to produce course-grained rocks. |
| How are sedimentary rocks made? | Sedimentary rocks are formed when sediment (bits of rock plus materials such as shells and sand) get packed together. |
| How are metamorphic rocks made? | Metamorphic rocks are igneous or sedimentary rocks that have been transformed by heat, pressure, or both. |
| What does the word "metamorphosis" mean? | It means to "change." Examples: Schist , slate, marble. |
Created by:
rakhi.kanwar
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