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2.6 > Biodiversity > Flashcards

Biodiversity Flashcards

1
Q

What is biodiversity?

A

The variety of organisms found in a particular place

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2
Q

State some benefits of biodiversity

A
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3
Q

State some threats to biodiversity

A
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4
Q

What is a habitat?

A

An environment that is home to living organisms.

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5
Q

What is meant by an “abiotic” factor?

A

A non-living variable that can influence where organisms can live.

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6
Q

Give examples of “abiotic factors” ?

A

Examples of abiotic factors are

  • water,
  • air,
  • soil,
  • sunlight
  • minerals.
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7
Q

What is meant by a “biotic factor” ?

A

An interaction associated with living organisms.

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8
Q

How can we measure the abiotic factor of soil moisture?

A

A moisture meter

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9
Q

How can we measure the abiotic factor of soil pH?

A

A pH meter

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10
Q

How can we measure the abiotic factor of soil temperature?

A

Inserting a thermometer into the soil

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11
Q

How can we measure the abiotic factor of light intensity?

A

A light meter

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12
Q

What is meant by a “population”?

A

The number of organisms of the same species

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13
Q

Where does all energy come from?

A

The sun

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14
Q

How do plants make sugar?

A

Photosynthesis

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15
Q

What is the photosynthesis equation

A
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16
Q

Which part of a plant absorbs light energy?

A

Chloroplasts in leaf cells

17
Q

How do plants store food?

A

As starch

18
Q

What is the chemical test for starch?

A

Turns iodine solution from brown to blue / black

19
Q

Give examples of sampling techniques.

A

Quadrat

Pitfall traps

Sweep nets

Tree shaking

20
Q

What is a quadrat?

A

A metal frame used to cound small organisms

21
Q

Why are quadrats thrown randomly onto a piece of grass?

A

to stop the results being biased by picking a certain area

22
Q

Give examples of biotic factors

A
  • competition for environmental resources
    • predation - a reduction in predators can lead to an increase in prey. High numbers of prey can lead to overgrazing, which can reduce biodiversity.
  • disease
  • food availability
23
Q

What is a “pitfall trap”?

A
24
Q

What is a benefit of fertilisers?

A

Increases the amount of crops grown andincreases rate of growth

25
Q

What are some problems caused by fertilisers?

A

Cause pollution of rivers

Increases nitrates which cause breathing problems

26
Q
A

2.6 (3 decks)

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