Ecosystems

Question 1

Ecosystem ?

Answer 1

An ecosystem is made up of organisms living together in a community, and their interactions with their physical surroundings.

Question 2

What are the two factors of an ecosystem ?

Answer 2

Abiotic factors are the non-living components in an ecosystem (e.g. air quality, humidity, sunlight, rainfall, etc).
Biotic factors are the living components in an ecosystem (e.g. predators, prey, competitors, etc.)

Question 3

Predation ?

Answer 3

type of feeding relationship where the predator obtains it food by killing and eating another animal (the prey).

Question 4

Competition ?

Answer 4

Competition involves organisms that have one or more resources in common

Question 5

Symbiosis definition ?

Answer 5

two organisms live together in a close relationship that is beneficial to at least one of them.

Question 6

Mutualism ?

Answer 6

relationship where two organisms live closely together and both benefit

Question 7

Commensalism ?

Answer 7

relationship in which one organism is benefited and the other is unaffected

Question 8

Parasitism ?

Answer 8

one species benefits and the other one suffers

Question 9

Why is food vital for an ecosystem ?

Answer 9

Source of matter and energy required by living things

Question 10

What are producers ?

Answer 10

Organisms that can produce their own food by photosynthesis

Question 11

What are consumers ?

Answer 11

Organisms that eat other organisms or producers.

Question 12

What are decomposers ?

Answer 12

bacteria and fungi which break down dead plant and animals, and recycle matter for producers to reuse.

Question 13

What is a food chain ?

Answer 13

shows the direction in which energy flows during feeding

Question 14

What is a food web ?

Answer 14

Many connected food chains

Question 15

True or False : Is matter cycled in ecosystems ?

Answer 15

True

Question 16

Does energy cycle ?

Answer 16

Energy does not cycle but flows being lost as it is being used

Question 17

What is a pyramid of biomass ?

Answer 17

the total mass of organisms at each level of the food chain.

Question 18

What is Habitat destruction ?

Answer 18

any damage done to the environmental factors that an organism depends on for survival (

Question 19

What are introduced species ?

Answer 19

Any species that has been bought to Australia that can act as predators or compietitors to natural Australian organisms

Question 20

What is overcropping ?

Answer 20

when more animals are killed than can be replaced by the normal breeding cycle

Question 21

What is chemical pollution ?

Answer 21

ny chemical wastes from industry, power stations, farms and transport