unit 2 lesson 1

Question 1

environment

Answer 1

which is all the conditions, circumstances, and influencers surrounding and impacting an organism

Question 2

natural resources

Answer 2

those elements of nature that have value, such as timber, soil, fresh water, or a mineral deposit.

Question 3

pollutants

Answer 3

substances introduced into the environment that have harmful effects or that make a resource less useful.

Question 4

Environmental Protection Agency (EPA)

Answer 4

This agency encourages policy that benefits the environment and helps regulate businesses so that the pollutants they create do not overwhelm the environment.

Question 5

pesticides

Answer 5

chemicals designed to kill insects, and fertilizers.

Question 6

Erosion

Answer 6

the wearing away of soil, usually due to either water or wind.

Question 7

herbicides

Answer 7

chemicals designed to kill certain plants, like weeds

Question 8

Air is another essential natural resource that needs to be free of pollutants for agriculture to thrive.

Answer 8

In terms of its chemistry, air is 21% oxygen, 78% nitrogen and 1% a mix of other gasses. If the level of oxygen in air falls below 21%, it becomes difficult to sustain life.

Question 9

ozone layer.

Answer 9

This layer of air forms a barrier between the Earth’s atmosphere (what we breathe) and the sun. It is about 15 miles above the Earth’s surface.