Ch. 5

Question 1

photosynthesis

Answer 1

process organisms use sunlight to make sugar

Question 2

producers

Answer 2

an organism that makes its own food

Question 3

consumer

Answer 3

organism that get their energy by eating other organisms

Question 4

decomposer

Answer 4

consumers that get their food by breaking down organic matter from dead organisms

Question 5

cellular respiration

Answer 5

process of breaking down carbohydrates to yield energy

Question 6

food chain

Answer 6

path in which energy is transferred from one organism to the next as each organism eats another organism

Question 7

food web

Answer 7

includes more organism and shows the feeding relationships between organisms that are possible in an ecosystem

Question 8

trophic level

Answer 8

each step through which energy is transferred in a food chain

Question 9

carbon cycle

Answer 9

process by which carbon is cycled between the atmosphere, land , water, and organism

Question 10

nitrogen fixin bacteria

Answer 10

can fix atmospheric nitrogen into a useful form called ammonia

Question 11

nitrogen cycle

Answer 11

a process in which nitrogen is cycled between the atmosphere, soil, and organisms.

Question 12

phosphorus cycle

Answer 12

the movement of phosphorus from the environment to organisms and then back to the environment

Question 13

ecological succession

Answer 13

gradual process of change and replacement of some or all of the species in a community`

Question 14

primary succession

Answer 14

succession can occur in areas that previously did not support life, such as rocks or sand dunes

Question 15

secondary succession

Answer 15

occurs in areas where an ecosystem has previously existed

Question 16

pioneer species

Answer 16

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

Question 17

climax community

Answer 17

is a final and stable community