7.5 Ech4 C-D Name: _________________

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Across
  1. 2. a sudden change
  2. 6. resource ___________ is the effort to oversee and control the use of natural resources so that they will be available in the future
  3. 7. believed to be made up of an inner and outer section and is at least partly liquid
  4. 8. resources that come from nonliving things are ___________ resources
  5. 10. a _______ resource is one that is being used
  6. 12. the lower part of the mantle, has rocks that are close to melting
  7. 14. makes up 84% of the Earth's mass
  8. 15. a _________ resource is one that is known but not being used
  9. 16. cannot be replenished, when it is used it is gone
Down
  1. 1. resources that come from living things are ____________ resources
  2. 3. __________ yield is using resources at a rate that allows them to replenish
  3. 4. unlimited or easily replenished
  4. 5. reusing or repurposing a resource to make it last longer
  5. 6. the ________ discontinuity is the name of the area that separates the crust from the mantle
  6. 9. solid, relatively low-density rock and ranges in thickness from 3-6 miles under the oceans to 13-56 miles on the continents
  7. 11. the combination of the crust and upper part of the mantle
  8. 13. contamination of a resource