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- 1. Multiple Choice
In the water cycle, evaporation of water from leaves is called
condensation
transpiration
groundwater
precipitation
- 2. Multiple Choice
Plant roots directly obtain water from
Water vapor
Groundwater stored below the soil
Precipitation
Water runoff from rivers and streams
- 3. Multiple Choice
The movement of water from the atmosphere to land is called
evaporation
transpiration
groundwater storage
precipitation
- 4. Multiple Choice
According to the diagram, deforestation
Can release carbon dioxide gas back into the atmosphere.
Directly creates fossil fuels.
Fixes carbon atoms in the soil,
Removes dissolved carbon dioxide from lakes and rivers.
- 5. Multiple Choice
Human activity can increase CO2 levels in the atmosphere through
Photosynthesis
Burning of fossil fuels
Planting more trees
Removing nitrogen from fertilizer.
- 6. Multiple Choice
According to the diagram, geologic activity, such as volcanoes,
Increases the levels of CO2 in the atmosphere.
Decreases the levels of CO2 in the atmosphere.
- 7. Multiple Choice
Humans obtain carbon by eating plants or eating other animals. Why do humans require carbon?
For cellular respiration.
For effective removal of CO2 gas.
For synthesis of all families of macromolecules.
For synthesis of lipids and carbohydrates only.
- 8. Multiple Choice
Nitrogen in the atmosphere is unusable. What form is nitrogen in the atmosphere?
Nitrites
Ammonia
Nitrates
N2 gas
- 9. Multiple Choice
Lightning can bring nitrogen gas into the soil in a process called
denitrification.
nitrogen fixation.
ammonification.
cellular respiration.
- 10. Multiple Choice
Denitrifying bacteria
Turn nitrogen gas into nitrates so that plants can synthesize amino acids.
Turn nitrates into nitrites so that nitrogen fixing bacteria can synthesize DNA.
Returns nitrogen into the atmosphere in the form of N2 gas.
Use phosphorus as fertilizer.
- 11. Multiple Choice
Phosphorus from the phosphorus cycle is used to synthesize
Carbohydrates
Nucleic acids
Amino acids
Triglycerides and steroids
- 12. Multiple Choice
The phosphorus cycle is unique in that
It is the only nutrient that is used as fertilizer for crops.
It is the only cycle that helps synthesize lipids.
It does not cycle through the atmosphere.
It is the only element that can be dissolved in water.
- 13. Multiple Choice
Plants obtain phosphorus for nucleic acid synthesis from
Inorganic phosphate rock
Runoff
Marine sediments
Phosphates in soil
- 14. Multiple Choice
Excess phosphates from fertilizer runoff can
be used to synthesize lipids.
be absorbed directly by phosphate rock.
be decomposed and returned to large bodies of water.
provide nutrients for algal blooms, which can cause eutrophication.
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