Ecosystems Science

The rapid rate of this process in tropical forests results in low-nutrient soils

• Photosynthesis

• Eutrophication

• Decomposition

• Denitrification

Tags

NGSS.MS-LS2-4

1. The process in the hydrologic cycle in which water vapor is released from leaves into the atmosphere is called

• Transportation

• Transpiration

• Percolation

• Infiltration

Tags

NGSS.MS-ESS2-4

Requires minimum safety standards for community water supplies

• Safe Drinking Water Act

• Clean Water Act

• Comprehensive Environmental Response Compensation and Liability Act (CERCLA)

• Resource Conservation and Recovery Act

Plant roots absorb ammonium ions and nitrate ions for use in making molecules such as DNA, amino acids, and proteins.

• Nitrification

• Denitrification

• Assimilation

• Ammonification

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Phytoplankton are most abundant in the upper few hundred feet of most bodies of water because

• they can most readily hide from predators there

• sunlight does not penetrate to great depths in water

• as primary producers, they must be accessible to many other organisms

• they feed on zooplankton, which are found only in the top layers of water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The movement of phosphorus between biological organisms and soil is in a steady state in an undisturbed system. Which of the following best explains the reason for this steady movement?

• Phosphorus is taken up by plants during photosynthesis to create carbohydrates.

• A decrease in buffer zones prevents phosphorus runoff in waterways

• There is a rapid influx of phosphorus from the weathering of rocks

• Readily available organic phosphorus in the soil is assimilated by plants

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which location has the greatest remaining biodiversity?

• A

• B

• C

• D

• E

Tags

NGSS.HS-LS2-2

The net annual primary productivity of a particular wetland ecosystem is found to be 8,000 kcal/m2 per year. If respiration by the aquatic producers is 12,000 kcal/m2 per year, what is the gross annual primary productivity for this ecosystem, in kcal/m2 per year?

• 4,000

• 8,000

• 16,000

• 20,000

• 96,000

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Nitrate ions and nitrite ions are converted into nitrous oxide gas and nitrogen gas (N₂).

• Nitrogen fixation

• Nitrification

• Denitrification

• Ammonification

Tags

NGSS.MS-LS2-3

The greatest amount of fresh water is found in which of the following?

• Atmosphere

• Estuaries

• Polar ice caps and glaciers

• lakes

• rivers and streams

Tags

NGSS.MS-ESS2-4