What type of fuel is wood?
Tick (✓) one box - AQA - GCSE Physics Combined Science - Question 4 - 2020 - Paper 1
Question 4
What type of fuel is wood?
Tick (✓) one box.
A non-renewable biofuel
A non-renewable fossil fuel
A renewable biofuel
A renewable fossil fuel
Worked Solution & Example Answer:What type of fuel is wood?
Tick (✓) one box - AQA - GCSE Physics Combined Science - Question 4 - 2020 - Paper 1
Step 1
What type of fuel is wood?
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Answer
Wood is classified as a renewable biofuel because it can be replenished naturally over time through sustainable forestry practices.
Step 2
Give two environmental effects of using wood as an energy resource.
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Answer
Burning wood causes air pollution by releasing smoke and particulate matter into the atmosphere.
Burning wood may lead to deforestation, which can threaten local ecosystems and contribute to habitat destruction.
Step 3
Describe the change to the stores of energy of the wood, pipe and water as the water is heated.
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Answer
Wood: The chemical store of energy in the wood decreases as it burns, releasing energy.
Pipe: The internal/thermal store of energy of the pipe increases as it absorbs heat from the burning wood.
Water: The internal/thermal store of energy of the water increases as it absorbs heat, leading to a rise in temperature.
Step 4
Explain why the temperature of the water stays constant.
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Answer
Even when the fire continues to burn, the temperature of the water stays constant because energy is being dissipated to the surroundings. At the same time, the energy is transferred to the water, maintaining a stable temperature until the combustion is no longer effective.
