B1.5 Energy and biomas Flashcards

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1
Q

What is trophic level 1?

A

The top carnivore

Owl

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2
Q

What is trophic level 2?

A

Omnivore/secondary consumer

Mouse

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3
Q

What is trophic level 3?

A

Herbivore/primary consumer

Bug

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4
Q

What s trophic level 4?

A

Producer

Grass

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5
Q

What is a detrital food chain?

A

A chain that starts with dead materials or waste

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6
Q

What are detrivores?

A

Organisms that eat dead material (dead leaves)

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7
Q

What do decomposers do?

A

Decay the bodies of other organisms but don’t eat them

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8
Q

What is biomass?

A

The dry weight of something (drain all the water out)

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9
Q

What does a biomass pyramid do?

A

Takes the traditional shape of a pyramid

     Lady birds    ..........aphids.......... ............Leaves............
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10
Q

What happens to the energy as it passes to the next consumer?

A

More is taken up by the consumer before so less is available to the next consumer

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11
Q

What is energy lost in? (3)

A
  • Heat (respiration)
  • Excreted (sweating and urine)
  • Egestion (faeces)
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12
Q

What do decomposers gain energy from?

A

Waste

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13
Q

How do farmers reduce energy loss? (3)

A
  • Keeping animals inside (less heat loss)
  • Use pesticides (pests don’t get all the energy from crops)
  • Keeping animals close together (reduces heat loss)
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