Chapter 2 - Nutrient Cycles

Question 0

Nitrogen that is returned to the atmosphere is called?

Answer 0

Denitrification

Question 1

Nitrogen gas converted into compounds that contain nitrate and ammonium is called?

Answer 1

Nitrogen fixation

Question 2

Excess nutrients that increase plant production and decay is called?

Answer 2

Eutrophication

Question 3

Carbon cycle.

1. How is it cycled?
2. It is important for?
3. How is it stored?
4. Human activities that involve carbon?

Answer 3

1. Photosynthesis, respiration, decomposition
2. Cellular respiration
3. Ocean floors, land, coal, atmosphere
4. Fossil fuels, clearing land.

Question 4

Nitrogen cycle.

1. It is important for?
2. How is it stored?
3. How is it cycled?
4. Human activities that involve nitrogen?

Answer 4

1. Component of DNA and proteins
2. Atmosphere, ocean, soil
3. Plants take it in, animals eat plants
4. Fossil fuels, power plants, sewage

Question 5

Phosphorus cycle.

1. It is important for?
2. How is it stored?
3. How is it cycled?
4. Human activities that involve phosphorus?

Answer 5

1. Life and animal processes
2. Phosphate rock, ocean floors
3. Chemical and physical weathering
4. Fertilizers, detergents and sewage

Question 6

What is nitrification?

Answer 6

Ammonium converted into nitrate

Question 7

What is sedimentation?

Answer 7

Soil partials and decaying organic matter that accumulate on ocean floors/ground.

Question 8

What is Weathering?

Answer 8

Rock that is broken into smaller pieces

Question 9

What is bioaccumulation?

Answer 9

Buildup of chemicals in living organisms

Question 10

What is biomagnification?

Answer 10

Chemicals that become more concentrated at each trophic level.

Question 11

What is a half-life?

Answer 11

Amount of time for half the pollutant to be eliminated

Question 12

POPs?

Answer 12

Chemicals with long half lives

Question 13

What is a keystone species?

Answer 13

Specifies that greatly effect the population.