Chapter 20 (our impact on land)

Question 1

all of the individuals of one species occupying a particular area

Answer 1

Population

Question 2

the largest number of individuals of a particular species that the environment can support

Answer 2

Carrying capacity

Question 3

substances that contaminate the environment

Answer 3

Pollutants

Question 4

the volume of water flowing past a point per unit of time

Answer 4

Stream discharge

Question 5

an area where each day’s garbage is deposited and cover with soil

Answer 5

Sanitary landfill

Question 6

wastes that are poisonous, that cause cancer, or that can catch fire

Answer 6

Hazardous wastes

Question 7

substances that make chemical reactions go faster

Answer 7

Enzymes

Question 8

the careful use of earth materials to reduce damage to the environment

Answer 8

Conservation

Question 9

piling yard wastes where they can decompose gradually

Answer 9

Composting

Question 10

using materials again

Answer 10

Recycling

Question 11

Why can’t plants used in phytoremediation be used to feed livestock?
A) It costs too much.
B) The plants die too quickly.
C) Livestock often is used to feed humans.
D) It tastes bad and livestock won’t eat it.

Answer 11

C) Livestock often is used to feed humans.

Question 12

Which of the following most positively impacts Earth's land and natural resources?
	A)	using mass transit
	B)	destruction of rain forests
	C)	farming
	D)	feeding livestock

Answer 12

A) using mass transit

Question 13

Why is Earth experiencing a population explosion?
A) because the population has always been increasing rapidly
B) because the number of people on Earth is increasing rapidly
C) because some people think Earth’s population is too small
D) because the population is maintaining a steady, but slow, increase.

Answer 13

B) because the number of people on Earth is increasing rapidly

Question 14

A changing water cycle in tropical areas might be a result of \_\_\_\_\_\_\_\_\_\_\_.
	A)	use of alternative energy resources
	B)	conservation efforts
	C)	overflowing garbage dumps
	D)	cutting down tropical rain forests

Answer 14

D) cutting down tropical rain forests

Question 15

Earth has a limited amount of space and resources. You could say that Earth is somewhat like \_\_\_\_\_\_\_\_\_\_.
	A)	an island
	B)	a continent
	C)	a peninsula
	D)	a mountain

Answer 15

A) an island

Question 16

Which of the following has NOT contributed to the increase in Earth's human population?
	A)	creating landfills
	B)	better medicine
	C)	better nutrition
	D)	clean water

Answer 16

A) creating landfills

Question 17

Which of the following is NOT caused by depletion of Earth's forests?
	A)	increased temperatures on Earth
	B)	increasing rainfall
	C)	increased levels of carbon dioxide
	D)	extinction of species

Answer 17

B) increasing rainfall

Question 18

Which of the following human practices does NOT aid in protecting the environment?
	A)	retire
	B)	reuse
	C)	recycle
	D)	reduce

Answer 18

A) retire

Question 19

One way to prevent liquid wastes from sanitary landfills from draining into the ground water is by __________.
A) allowing only certain items to be dumped
B) spraying them down
C) lining the landfills
D) emptying them out regularly

Answer 19

C) lining the landfills

Question 20

If an environment exceeds its carrying capacity, what will happen to its resources?
	A)	They will stay the same.
	B)	They will increase.
	C)	They will run out.
	D)	They will be unaffected.

Answer 20

C) They will run out.

Question 21

What process produces pollutants?
	A)	refining oil
	B)	harnessing hydropower
	C)	collecting wind
	D)	carpooling

Answer 21

A) refining oil

Question 22

What is one thing a company could do to help lessen the impact today's throwaway culture has on the environment?
	A)	reduce packaging
	B)	build more plants
	C)	increase production
	D)	lower costs

Answer 22

A) reduce packaging

Question 23

Why is preserving national forestlands, grasslands, and parks important?
A) It will benefit future generations.
B) It will keep land safe so it can be used later.
C) because humans can use it to store wastes
D) because eventually humans will need more forests for lumber

Answer 23

A) It will benefit future generations.

Question 24

Which is an example of how people can help conserve natural resources in the home?
	A)	buying products that are packaged
	B)	composting
	C)	using fossil fuels
	D)	disposing of aluminum cans

Answer 24

B) composting

Question 25

Which of the following is NOT an effect of paving streets?
	A)	increased rainfall
	B)	reduced ground water supplies
	C)	increased runoff
	D)	increased stream discharge

Answer 25

A) increased rainfall

Question 26

The \_\_\_\_\_\_\_\_\_\_\_\_\_ is the largest number of individuals of a particular species that the environment will support.
	A)	carrying capacity
	B)	population
	C)	society
	D)	holding point

Answer 26

A) carrying capacity

Question 27

An example of a fossil fuel is\_\_\_\_\_\_\_\_\_\_.
	A)	nuclear
	B)	wind
	C)	oil
	D)	hydropower

Answer 27

C) oil

Question 28

What kinds of items often are found in a compost pile?
	A)	plastic
	B)	metal
	C)	paper
	D)	leaves

Answer 28

D) leaves

Question 29

How does a plant’s enzymes help in the reduction of organic pollutants?
A) They can maintain the rate at which the pollutants break down.
B) They can slow down the rate at which the pollutants break down.
C) They can make the pollutants disappear.
D) They can speed the rate at which the pollutants break down.

Answer 29

D) They can speed the rate at which the pollutants break down.

Question 30

Organic farming techniques use natural fertilizers, crop rotation, and biological pesticides all in an effort to preserve\_\_\_\_\_\_\_\_\_.
	A)	money
	B)	species
	C)	jobs
	D)	topsoil

Answer 30

D) topsoil