Review Qs: Biogeochemical Cycle

The repeated movement of water between Earth’s surface and the atmosphere is called

• the water cycle.
• the condensation cycle.
• precipitation.
• evaporation.

Which part of the water cycle is a biological process?

• transpiration
• runoff
• precipitation
• condensation

Nitrogen fixation is carried out primarily by

• humans.
• plants.
• bacteria.
• consumers.

Animals get the most of the nitrogen they need

• by consuming plants or other animals.
• by breathing in atmospheric nitrogen.
• directly from bacteria in the soil.
• from the process of denitrification.

Which steps in Figure 3–9 show the carbon cycle passing through living systems?

• Respiration, photosynthesis, feeding, and decomposition

• Volcanic activity

• Deposition

• Human Activity

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What role do bacteria play in the nitrogen cycle?

• Convert inorganic nitrogen into organic nitrates
• Break down dead organisms
• Move nitrogen from the atmosphere into the soil
• Turn nitrates into nitrogen gas.

Tags

NGSS.MS-LS2-3

Which of these disruptions would cause an excess output in the carbon cycle?

• increases in terrestrial biota

• increase in the use of fossil fuels

• increases in marine biota

• thickening of ocean sediments

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

Tags

NGSS.MS-PS1-1

How do plants get the nitrogen they need?

• from the air
• from the soil or water in which they live
• from the Sun
• from broken-down rocks

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

A particular golf course is using large amounts of nitrogen fertilizer. What process could move this nitrogen into a local stream?

• volatilization
• nitrogen fixation
• runoff
• ammonification