Ecosystems - food chains and food webs

Question 1

Ecosystem

Answer 1

Self contained interacting community of organisms and the environment (biotic and abiotic) in which they live and interact
eg. a lake - freshwater aquatic

Question 2

Dynamic system

Answer 2

Constantly changing - in a state of flux

Question 3

Biotic factor

Answer 3

Living components of an ecosystem that affect the organisms living there
eg. disease, competition, increase in predators

Question 4

Abiotic factor

Answer 4

Non living components of an ecosystem that affect the organisms living there
eg. temperature, water, food, O2 concentration

Question 5

Producer

Answer 5

Beginning of food chain - make own food
Produce organic molecules (eg. sugar) from inorganic ones (eg. CO2) by using an energy source (eg. light)
eg. any green plant

Question 6

Consumer

Answer 6

Organisms that feed on organic matter made by plants
Usually heterotrophs
Consumes producer
eg. Tiger

Question 7

Decomposer

Answer 7

Organisms that break down dead or undigested organic material
eg. Bacteria and fungi

Question 8

Trophic level

Answer 8

One of the steps in a food chain

eg. primary producer, primary consumer

Question 9

Habitat

Answer 9

The place where an organism lives
Provides correct environmental conditions
eg. Salmon - changes throughout its life

Question 10

Population

Answer 10

Group of organisms of the same species living together in the same space at the same time
eg. humans