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act.12-23 DMS7
activitys 12-23, science, DMS, 7th grade, Mrs. Toth
| Question | Answer |
|---|---|
| natural resources | materials that are found on earth and are used by people |
| renewable | something that is commonly found and used, can be used over and over again |
| nonrenewable | harder to find, more valuable, worth more money, harder to get, might be older |
| Crystal shape | the shape of the crystal example: tetrahedron, cube, octahedron, and rhombohedron |
| luster | how shinny an object is |
| property | observations like the one you made con be used to identify different minerals |
| transparency | property of weather an item can be seen through |
| Octahedron | 8 sides and each side is a triangle |
| fluorite | a non-living solid found naturally on earth it is made of calcium and fluorine atoms arranged in crystalline structure |
| crystalline structure | specific set of atoms that are arranged in a repeating pattern, in the right environment, minerals form large crystals because they have this |
| geologist | people who study rocks, minerals, and other non-living parts of the earth |
| mineral | non-living materials that are found naturally on earth, normally hard, has structure |
| rock | made of minerals, some of these minerals are harder to find, although others are very common and easy to find |
| igneous | forms when magma cools |
| magma | the heat/melted rocks that when this cools it turns into an igneous rock |
| metamorphic | high heat and/or high pressure of the Earth |
| sedimentary | sediments ( tiny rock pieces ) cementing together |
| erosion | |
| rock cycle | how one type of rock becomes another |
| sediment | parts of rocks, shells, and dead organisms that have been worn down into small pieces, by the effects of wind and water |
| trade off | something that you do that results in something else to happen; we bought a mined rock, but it costs more |
| ________________ rocks can contain fossils | sedimentary |
| In __________________ rocks, you can see bands | metamorphic |
| ______________ rocks can be smooth or glassy or there are large visible crystals that can can be seen by the human eye | Igneous |