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This question is about fuels and energy - AQA - GCSE Chemistry - Question 1 - 2021 - Paper 2
Question 1
This question is about fuels and energy. Figure 1 shows the percentage of electricity generated in the UK between 2007 and 2017 using: • oil • solar energy. 1.1 D... show full transcript
Worked Solution & Example Answer:This question is about fuels and energy - AQA - GCSE Chemistry - Question 1 - 2021 - Paper 2
Step 1
Describe the changes in the percentage of electricity generated in the UK between 2007 and 2017 using: • oil • solar energy.
Answer
From 2007 to 2017, the percentage of electricity generated from oil in the UK has decreased significantly from approximately 1.3% in 2007 to about 0.5% in 2017, marking a decline of 0.8%. In contrast, solar energy saw a substantial increase, rising from 0% in 2007 to 3.4% in 2017. This indicates a shift towards renewable energy sources and a reduction in reliance on oil.
Step 2
Explain the environmental effects of releasing these products of combustion into the atmosphere.
Answer
When oil is burned, it produces carbon dioxide (CO2), a greenhouse gas that contributes to global warming. The increase in CO2 levels leads to climate change, resulting in extreme weather events and rising sea levels. Additionally, sulfur dioxide (SO2) is produced, which can lead to acid rain, damaging ecosystems, buildings, and aquatic life. Particulate matter and carbon monoxide are also emitted, causing respiratory issues in humans and affecting air quality.
Step 3
Suggest one reason why using solar energy is a more sustainable way of generating electricity than burning oil.
Answer
Solar energy is a renewable source of energy, meaning it can be harnessed indefinitely without depleting resources, whereas burning oil is finite and contributes to greenhouse gas emissions.
Step 4