Decomposition (AQA GCSE Biology): Quizzes

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Decomposition
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What is decomposition?

When dead materials break down and rot

What breaks down dead plants and animals during decomposition?

Microorganisms

How does warmer temperature affect the rate of decay?

It speeds up decay

Why do microorganisms need water for decomposition?

To survive and carry out life processes

What happens to decay in very dry conditions?

It slows down

What type of respiration do microorganisms use when oxygen is present?

Aerobic respiration

How does aerobic respiration compare to anaerobic respiration in decomposition?

Aerobic is much faster

What do biogas generators produce?

Methane gas and biogas

What is put into a biogas generator?

Animal waste in a sealed container

What does composting create for gardeners?

Natural fertiliser

If grass loses 45g in 6 days, what is the rate of decay using massdays\frac{\text{mass}}{\text{days}}?

7.5g7.5g per day

Why does disinfectant slow down decay?

It kills microorganisms

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