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Environmental Science

Environmental Science
Commonly used radioactive isotopes in scientific research

14 C
all of these
32 P
125 I

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Environmental Science
World Ozone day is

43906
43987
44090
44151

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Environmental Science
__________ is derived recently from living organisms and their metabolic products.

Biomass
Fossil fuel
Biofuel
Gobar gas

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Environmental Science
Oil, coal and natural gas supply approximately __________ % of the energy used in the United States

81
40
25
10

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Environmental Science
In an aquatic ecosystem, the depth to which light penetrates is called

photic
aphotic
nonphotic
euphotic

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Environmental Science
The pioneers in xerach succession is the

crustose lichen
shrubs
foliose lichen
mosses

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