Chapter 22

Question 1

What is global change?

Answer 1

Widespread effects on the worldwide ecosystem.

Question 2

Air pollution is a major problem in the world’s C _ _ _ _ s. Industrial pollution releases S _ _ _ _ r O _ _ _ _ s that contribute to a condition known as s _ _ g.

Answer 2

Cities, Sulfur Oxides, Smog.

Question 3

True or false: fertilizers, herbicides, and insecticides are used on land and end up in our water. This contributes to water pollution. Also, fertilizer runoff contributes to a condition known as eutrophication.

Answer 3

True.

Question 4

Soil pollution: the buildup of toxic compounds, chemicals, salts, radioactive materials or disease-causing agents in soil.

Can toxic chemicals circulate in the ecosystem, even if they are no longer manufactured?

Why was DDT banned in the US?

Biological magnification refers to toxins increasing in concentration as they move up the food chain.
True or false: this means TOP PREDATORS will NOT consume a higher concentration of toxins.

Answer 4

Yes, toxic chemicals can still circulate the ecosystem, even if they are no longer being produced.

DDT was banned because breaks down slowly and can end up in animal tissue.

False, top predators will consume higher concentrations of toxins.

Question 5

True or false: plastic pollution is real. It contributes to garbage patches, which are swirling trash piles in the ocean.

Answer 5

True.

Question 6

Why are microplastics an issue?

Answer 6

They end up in the environment and food chain.

Question 7

What is biological magnification?

Answer 7

Toxins become increasingly concentrated as they move up the food chain.

Question 8

What is global warming and what is it caused by? Hint: G _ _ _ _ _ _ _ _ e G _ _ _ s. CO2/Carbon Dioxide is a major contributor.

Answer 8

It is a rise in average global temperatures and it’s caused by greenhouse gases. CO2 is an example of a greenhouse gas.

Question 9

What are the effects of global warming?

1) Changes to r _ _ _ _ _ _ l patterns.
2) Variations in a _ _ _ _ _ _ _ _ _ e + its yield
3) M _ _ _ _ _ g of ice in glaciers and the polar ice caps, causing rising sea levels and flooding.
4) Extreme w _ _ _ _ _ r
5) Increased occurrence of contagious d _ _ _ _ _ _ s.

Answer 9

Rainfall, agriculture, melting, weather, disease.

Question 10

What are three factors that play a role in extinction?

1) H _ _ _ _ _ t L _ _ s
2) O _ _ r - H _ _ _ _ _ _ _ _ g
3) I _ _ _ _ _ _ e S _ _ _ _ _ s.

Answer 10

Habitat loss, species overexploitation/over-harvesting, and invasive species.