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