Ecology Test

Question 1

3 Human Activities and How they Affect

Answer 1

1. recycling: helps earth
2. cutting down trees: causes global warming
3. trash in ocean: wrecks ecosystem

Question 2

difference between renewable and nonrenewable?

Answer 2

renewable: can be reused (wind,wood,solar)
nonrenewable: cannot be reused (coal,natural gas)

Question 3

why is biodiversity important?

Answer 3

a variety of life that can create food webs and population control.

Question 4

world population

Answer 4

7.5 billion

Question 5

USA population

Answer 5

330 million

Question 6

biodegradable definition

Answer 6

able to be broken down naturally (food scraps, dead bodies, wood)

Question 7

what is biological magnification?

Answer 7

pollution travels through food web and cannot be digested.

Question 8

what is eutrophication?

Answer 8

water acquires nutrients from fertilizer

Question 9

what are invasive species?

Answer 9

in environment where they don’t belong.

Question 10

what is a dead zone?

Answer 10

areas where pollution causes death.

Question 11

invasive species examples

Answer 11

gobi, asian carp, gypsy moth, zebra mussels, sea lamprey.

Question 12

what is the ozone layer made of?

Answer 12

03

Question 13

what is the job of the ozone layer?

Answer 13

protects us from UV rays

Question 14

what destroyed the ozone layer?

Answer 14

CFC’s

Question 15

what materials contain CFC’s?

Answer 15

aerosol cans, freon

Question 16

where was the ozone hole?

Answer 16

above antarctica

Question 17

what phrase must we remember?

Answer 17

UV is not infrared so ozone does not cause global warming.

Question 18

what is the “greenhouse effect”?

Answer 18

CO2 gases form a “blanket” which keeps the heat inside the earth.

Question 19

causes of global warming

Answer 19

• humans
• cars
• factories
• fossil fuels
• cutting down trees

Question 20

consequences of global warming?

Answer 20

• glaciers melt
• extinction (polar bears)
• lose water
• rising sea level
• extreme weather