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21.6: Earth's Materials- Challenge 1

Last updated

Oct 16, 2020
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- 21.5: Ore Extraction
- 21.7: Environmental Impacts of Mining

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1. Paper can be made mostly or entirely from ___.: renewable resources

2. Electronics need specific materials known as ___.: rare earth elements

3. A ___ resource is unlimited or replenished as quickly as it is used.: renewable

4. ___ resources cannot be replenished fast enough to keep up with human use.: Non-renewable

5. ___ form over millions of years from the remains of dead organisms and are mainly comprised of ___.: Fossil fuels; carbon

6. Regions where hot fluids came off a magma intrusion often have ___.: copper deposits

7. A mineral deposit that is profitable is called an ___.: ore deposit

8. Geologists determine the size of the deposit, test the concentration of ore in rock samples, and estimate the total amount of minerals in a ___.: mineral deposit

9. A ___ is a type of open-pit mine where rocks and minerals used to make buildings and roads are extracted.: quarry

10. Valuable minerals found in stream gravels are called ___.: placers

11. Panning for gold in streams works because ___.: gold sinks to the bottom of the pan

12. After ore is extracted from a mine, valuable minerals must be separated from ___.: waste rock

13. Around the world, humans use over ___ aluminum cans each year.: 80 billion

14. To save ten gallons of gasoline that would otherwise be used to produce new aluminum cans, ___ used aluminum cans must be recycled.: 400

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