Biology: Chapter 5

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What does the word biomass mean?
The mass of living material
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What is a trophic level
The levels of a food chain
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Why do most food chain have no more than five trophic levels?
Because a lot of energy and biomass is lost at each stage
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What does the bottom of the pyramid always represent? (Trophic levels)
It always represents the producer (a plant)
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How is energy lost in the food chain?
It is lost by waste products (faeces and urine)
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Why do things decay?
Materials decay because they are broken down (digested) by microorganis
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What three conditions do micro-organisms work best at?
They work best when there is moisture, warmth and plenty of oxygen
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What are decomposers?
Decomposers are organisms that break down dead or decaying organisms
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Name a decomposer?
Bacteria or fungi
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What is the carbon cycle in nature?
The constant cycle of carbon in nature is known as the carbon cycle
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Which processes removes carbon dioxide from the?
Carbon dioxide is removed from the atmosphere by photosynthesis
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Which process returns the carbon dioxide to atmosphere?
It is returned to the atmosphere through respiration and combustion
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Name the process that releases carbon dioxide from fossil fuels?
Combustion / buring
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Other cards in this set

Card 2

Front

What is a trophic level

Back

The levels of a food chain

Card 3

Front

Why do most food chain have no more than five trophic levels?

Back

Preview of the front of card 3

Card 4

Front

What does the bottom of the pyramid always represent? (Trophic levels)

Back

Preview of the front of card 4

Card 5

Front

How is energy lost in the food chain?

Back

Preview of the front of card 5
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