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Pre-Test
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1
Which of the following is biotic?
A)water
B)bacteria
C)pH
D)energy
2
The majority of the humans on Earth generally occupy which trophic level?
A)first
B)second
C)third
D)fourth
3
Water enters the atmosphere as a result of
A)photosynthesis.
B)respiration.
C)evaporation.
D)condensation.
4
Nitrogen of the organic molecules in your body comes from
A)the air you breathe.
B)the water you drink.
C)carbohydrates in the food you eat.
D)proteins in the food you eat.
5
Which one of the following does NOT cycle through an ecosystem?
A)energy
B)water
C)carbon
D)nitrogen





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