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B2 topic 9: Ecosystems and material cycles > Ecosystems > Flashcards

Ecosystems Flashcards

1
Q

What is an ecosystem?

A

The interaction between all living things in a habitat, and the non-living environment they live in

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2
Q

What is a community?

A

The different species which live in a particular habitat

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3
Q

What is a population?

A

A group of the same species living in one area

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4
Q

What is an organism?

A

A living thing

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5
Q

What is a habitat?

A

The place where a living thing lives

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6
Q

What is interdependence?

A

When organisms depend on each other for resources such as food, shelter, etc.

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7
Q

What is the difference between a community and a population?

A

A population is a group of the same species living in one area, whereas a community includes all the different species in an area.

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8
Q

What is the difference between a community and an ecosystem?

A

A community includes all the living things in one area, whereas an ecosystem includes both living and non-living things.

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9
Q

What is an abiotic facator?

A

Non-living aspects of an ecosystem

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10
Q

What are biotic factors?

A

Living factors in an ecosystem

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11
Q

Give some examples of abiotic factors

A

e.g. light intensity, temperature, oxygen availability, strong winds, regular flooding

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12
Q

Give some examples of biotic factors

A

e.g. predators, prey, competition for food or space

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13
Q

Which piece of equipment do you need to estimate the population of daisies in a field?

A

quadrat

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14
Q

What is a parasitic relationship?

A

Where two different organisms live together. The parasite benefits and the host suffers

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15
Q

What is a mutualistic relationship?

A

Where two different organisms depend on each other and both benefit

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16
Q

Which types of organisms are producers?

A

Plants and algae

17
Q

What are producers?

A

An organism which photosynthesises to produce energy

18
Q

which key word describes animals which eat producers?

A

Primary consumers

19
Q

Which key word describes animals which eat primary consumers?

A

Secondary consumers

20
Q

What do the arrows in a food chain represent?

A

The transfer of energy

21
Q

What is biomass?

A

The dry mass of an organism or group of organisms

22
Q

In a pyramid of biomass, what do the bars represent?

A

The total biomass of each stage in a food chain

23
Q

What is a trophic level?

A

A step in the food chain

24
Q

How is energy lost in a food chain?

A

due to movement, heat loss, excretion (faeces and urine)

25
Q

How is efficiency in a food chain calculated?

A

= energy transferred to biomass / energy supplied

B2 topic 9: Ecosystems and material cycles (3 decks)

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