2.2 Communities and Ecosystems

Question 1

Community

Answer 1

a group of populations living and interacting with each other in an ecosystem

Question 2

Ecosystem

Answer 2

a community and the physical environment it interacts with

Question 3

Respiration

Answer 3

the process of creating energy through the chemical process of turning organic matter into CO2 and water

Question 4

Photosynthesis

Answer 4

the process of producing raw material that is used for making biomass

Question 5

Producer

Answer 5

an organism that creates its own food

Question 6

Consumer

Answer 6

an organism that consumes other organisms to obtain energy

Question 7

Decomposer

Answer 7

an organism that decomposes organic matter

Question 8

Food Web

Answer 8

a system of foodchains in an ecosystem

Question 9

1st Law of Thermodynamics

Answer 9

energy is neither created nor destroyed, only changes forms

Question 10

2nd Law of Thermodynamics

Answer 10

the entropy of a system increases over time

Question 11

Biomass

Answer 11

organic material that comes from plants and animals

Question 12

Bioaccumilation

Answer 12

the build up of non biodegradable pollutants in an ecosystem or trophic level because they cannot be broken down

Question 13

Biomagnification

Answer 13

the increase in concentration of non biodegradable pollutants in a food chain

Question 14

Ecological Pyramid

Answer 14

a model that illustrate the differences that exist from trophic level to trophic level in an ecosystem

Question 15

Entropy

Answer 15

Entropy is a measure of the amount of disorder in a system. An increase in entropy arising from energy transformations reduces the energy available to do work.