Distribution of Organisms Flashcards

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1
Q

What term is used to describe ‘living’ factors that affect the distribution of organisms?

A

Biotic

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2
Q

What term is used to describe ‘non-living’ factors that affect the distribution of organisms?

A

Abiotic

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3
Q

State 5 biotic factors that can affect the distribution of organisms.

A

competition, disease, predation, grazing and food availability.

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4
Q

State 4 examples of abiotic factors that affect the distribution of organisms.

A

light intensity, temperature, pH and moisture.

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5
Q

Name the piece of equipment used to measure temperature.

A

Thermometer

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6
Q

Name the piece of equipment used to measure light intensity.

A

Light meter

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7
Q

Name the piece of equipment used to measure moisture.

A

moisture meter

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8
Q

Name the piece of equipment used to measure pH

A

pH meter

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9
Q

State one possible error when using a moisture meter.

A
  1. Putting it in to different depths 2. Not wiping the probe between readings
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10
Q

State one possible error when using a light meter.

A

Accidentally casting a shadow

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11
Q

Name the equipment used to sample plants

A

Quadrat

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12
Q

When using a quadrat, what do you count?

A

The number of squares a plant is found in

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13
Q

What is used to sample small insects in an area?

A

A pitfall trap

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14
Q

When sampling, why is it important to take many readings?

A

Increases the reliability of your results

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15
Q

What are paired statement keys used for?

A

To identify organisms

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16
Q

What name is given to a species that by its presence of absence gives an indication to the level of pollution?

A

Indicator species

17
Q

Why is it important to check pitfall traps regularly?

A

to avoid animals escaping or being eaten before they are counted

18
Q

Why are roofs put on pitfall traps?

A

to keep out the rain, to make it dark, to prevent birds from eating the insects