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Environmental Sciences Quiz 1 (25 MCQs)

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1. The _____ is the mixture of gases making up the air.
2. Land that is used to graze livestock is known as
3. This period in history is when humans grew plants and animals were raised and harvested, the human population dramtically increased.
4. When was Earth Summit held in Brazil in which a treaty was signed to control the production of greenhouse gases?
5. When irrigated land becomes salinized, it is _____
6. Developed nations make up about _____ percent of the world's population and consume about _____ percent of its resources
7. Chlorofluoro-carbons are very stable and when they reach _____ kilomtres altitude (where the concentration of ozone is supposed to be highest), they are subjected to intense ultraviolet radiation from the sun.
8. Which is faster:Primary or Secondary Succession?
9. What is Cost-Benefit Analysis?
10. The distance north or south of the equator is called _____
11. The Earth is similar to being on an island because _____
12. The designation of wilderness areas
13. A forest that sheds its leaves in the fall
14. The measure of the energy released by an earthquake is called
15. Decomposes are bacteria and fungi which degrade _____ organic matter.
16. During which season is the northern hemisphere tilted toward the Sun?
17. Which steps are usually near the beginning of a scientific investigation?
18. Primary Succession is all of the following except _____
19. The variable in an experiment deliberately changed by the scientist. The variable being tested.
20. Chlorofluoro-carbon gases were introduced about _____ years ago.
21. All of the following make up the three major categories of environmental problems except
22. One of the most important ecosystem services provided by forests is removing _____ from the atmosphere.
23. Ozone is a/an _____ gas.
24. Plates of the lithosphere float on the
25. VOCABULARY:The number of individuals in a population per unit of area.
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