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Chapter 2.3
Test Description: Cycles in the Biosphere
Instructions: Answer all questions to get your test result.
1) The law of conservation states that:
A
matter is not created or destroyed
B
matter doesn't matter
C
matter can never be replenished
D
matter fluctuates from year to year
2) How do nutrients cycle through the biosphere?
A
through consumers
B
through producers
C
through organisms
D
through plants
3) A chemical substance that an organism needs to perform life processes is called?
A
nitrogen
B
matter
C
oxygen
D
a nutrient
4) The combination of processes that exchange matter through the biosphere is called?
A
the nitrogen cycle
B
the water cycle
C
the biogeochemical cycle
D
the life cycle
5) Which statement is not a step in the water cycle?
A
precipitation
B
transpiration
C
evaporation
D
weathering
6) Autotrophs and heterotrophs release carbon dioxide into the air during:
A
the phosphorus cycle
B
photosynthesis
C
cellular respiration
D
denitrification
7) Nitrogen is returned to the soil when-
A
plants grow
B
humans pollute the ground
C
animals urinate and organisms die
D
contaminates seep into the ground
8) Growth of producers is limited by-
A
the amount of nitrogen compounds available
B
the amount of animal waste
C
the amount of phosphorus available to them
D
the amount of consumers available
9) Who begins the nutrient cycle through the biosphere?
A
consumers
B
producers
C
autotrophs
D
heterotrophs
10) At each step in the food web, organisms reuse __________ to make proteins.
A
dioxide
B
carbon dioxide
C
oxygen
D
nitrogen
*select an answer for all questions
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