Ecosystems and Material Cycles T9

Question 1

What is an individual in an ecosystem?

Answer 1

A single organism

Question 2

What is a population in an ecosystem?

Answer 2

All the organisms of one species in a habitat

Question 3

What is a community in a n ecosystem?

Answer 3

All the organisms of different species living in a habitat

Question 4

What is an ecosystem?

Answer 4

A community of organisms along with all the non-living conditions

Question 5

What is mutualism?

Answer 5

Mutualism is a relationship between two organisms, from which both organisms benefit

Question 6

What is a parasite?

Answer 6

Parasites live very closely with a host species. The parasite take what it needs and the host doesn’t benefit

Question 7

The 4 main abiotic factors?

Answer 7

Temperature, amount of water, light intensity and levels of pollutant

Question 8

2 main biotic factors?

Answer 8

Competition and predation

Question 9

What is a quadrat?

Answer 9

A square frame enclosing a known area

Question 10

How does energy get lost in a food chain?

Answer 10

Energy is used by each organism to stay alive?

Question 11

Why are there never more than 5 trophic levels in a food chain?

Answer 11

Because so much energy is lost at each trophic level that there is not enough to support any higher levels

Question 12

What is a pyramid of biomass?

Answer 12

A pyramid of biomass shows how much the creatures at each level of the food chain would weigh if you pit them toegther

Question 13

How do you work out efficency?

Answer 13

Efficiency = energy transferred to next level / energy available at previous level x 100

Question 14

What is biodiversity?

Answer 14

Biodiversity is the variety of living organisms in an ecosystem.

Question 15

What is eutrophication?

Answer 15

An excess of nutrients in water

Question 16

What happens when an non-indigenous species is put into an area?

Answer 16

The non-indigenous species is introduced, it competes with the indigenous species for resources like food and shelter. Sometimes they are better at doing this so the indigenous species will have their numbers decrease until they are extinct

Question 17

What is reforestation?

Answer 17

Reforestation is when land where a forest previously stood is replanted to form a new forest

Question 18

What are conservation methods we use today?

Answer 18

Protecting a species natural habitat.
Protecting species in safe areas outside of their natural habitat
The use of seed banks to store and distribute the seeds of rare and endangered plants