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Unit 3 Test, Earth Science, 2nd Semester
Test Description: Biogeochemical Cycles
Instructions: Answer all questions to get your test result.
1) What role do producers play in the carbon cycle?
A
They release CO2 for photosynthesis
B
They use CO2 for photosynthesis
C
They release CO2 during transpiration.
D
They use O2 for photosynthesis
2) Which of the following are often involved in a biogeochemical cycle?
A
Living organisms
B
Environment
C
All of the above
D
Molecules
3) The burning of fossil fuels releases which of the following gases into the atmosphere?
A
Nitrogen
B
Methane
C
Carbon dioxide
D
Oxygen
4) Which element is the main component of all life?
A
Carbon
B
Oxygen
C
Nitrogen
D
Sulfur
5) During which step of the water cycle is water changed from a vapor state to a liquid state?
A
Condensation
B
transpiration
C
precipitation
D
evaporation
6) How do trees affect the water cycle if they are removed?
A
More carbon dioxide is released
B
More photosynthesis
C
More nitrogen fixation occurs
D
Transpiration declines
7) Carbon dioxide enters the atmosphere through each of the following processes except one. Which one?
A
photosynthesis
B
volcanic eruptions
C
burning fossil fuels
D
respiration
8) Water can enter the atmosphere which two ways?
A
Evaporation and condensation
B
Evaporation and transpiration
C
Transpiration and sublimination
D
Transpiration and condensation
9) Which of the following is needed for the nitrogen cycle?
A
Condensation
B
Transpiration
C
Decomposers
D
Movement of the earth's plates
10) Where is the largest reservoir of carbon on earth located?
A
Atmosphere
B
Earth's crust
C
Volcanoes
D
Oceans
11) Marine organisms such as coral and shellfish have carbon in their bodies in which of the following forms?
A
Carbon dioxide
B
Carbon monoxide
C
Calcium Carbonate
D
Pure Carbon
12) Carbon in the bodies of marine organisms often is changed into which of the following forms?
A
metamorphic rock such as slate
B
igneous rock such as granite
C
sedimentary rock such as sandstone
D
sedimentary rock like limestone
13) Which of the following is the source of energy for the water cycle?
A
Gravity
B
Sun
C
Wind
D
Volcanoes
14) In what form is most carbon released into the atmosphere?
A
Methane
B
Carbon monoxide
C
Carbon dioxide
D
C2
15) The carbon cycle works in conjunction with which of the following?
A
All biogeochemical cycles
B
Nitrogen cycle
C
Oxygen cycle
D
Water cycle
*select an answer for all questions
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