chapter 4 key terms

Question 1

photosynthesis

Answer 1

when an organism uses sunlight to make sugar in a process

Question 2

producer

Answer 2

an organism that can make their own food (plants)

Question 3

consumer

Answer 3

organisms that get their food and energy from eating other organisms

Question 4

decomposer

Answer 4

a consumer that gets its food from breaking down orgnic matter from dead organisms

Question 5

cellular respiration

Answer 5

the process of breaking down carbohydrates to yield energy

Question 6

food chain

Answer 6

the path in which energy is transformed from one organism to the next

Question 7

food web

Answer 7

more organisms that shows a feeding relationship

Question 8

trophic level

Answer 8

each step through which energy is transferred in a food chain

Question 9

carbon cycle

Answer 9

a process is which carbon is cycled between the atmosphere,land,water and organisms

Question 10

nitrogen-fixing bacteria

Answer 10

can fix atmospheric nitrogen into a useful form called ammonia

Question 11

nitrogen cycle

Answer 11

the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems.

Question 12

phosphorus cycle

Answer 12

the movement of phosphorus is from environment to organism

Question 13

ecological succession

Answer 13

is a gradual process of change and replacement of some or all of the species

Question 14

primary succession

Answer 14

a more common type of succession

Question 15

secondary succession

Answer 15

occurs in areas where an ecosystem has previously existed

Question 16

pioneer species

Answer 16

a species that colonize an uninhabited area and begins the process of ecological succession

Question 17

climax community

Answer 17

a final and stable community