This question is about the Earth's atmosphere. Carbon dioxide is a greenhouse gas. What is another greenhouse gas? Tick one box. Argon Methane Nitrogen Oxygen Greenhouse gases cause global climate change. Give two effects of global climate change. 1 2 4.1 kg of a plastic, used to make plastic bottles, has a carbon footprint of 6.0 kg of carbon dioxide. Calculate the carbon footprint of one plastic bottle of mass 23.5 g. Carbon footprint = kg of carbon dioxide Give one way that carbon dioxide emissions can be reduced when a plastic bottle is manufactured. Explain how the percentages of nitrogen, oxygen and carbon dioxide in the Earth’s atmosphere today have changed from the Earth’s early atmosphere.

GCSE AQA Chemistry Combined Science The Earths Atmosphere: This question is about the Earth

This question is about the Earth's atmosphere - AQA - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 2

Question 2

This question is about the Earth's atmosphere. Carbon dioxide is a greenhouse gas. What is another greenhouse gas? Tick one box. Argon Methane Nitrogen Oxygen... show full transcript

Worked Solution & Example Answer:This question is about the Earth's atmosphere - AQA - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 2

Step 1

What is another greenhouse gas?

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Answer

Another greenhouse gas is Methane.

Step 2

Give two effects of global climate change.

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Answer

Rising sea levels due to melting ice caps.
Extreme weather events such as hurricanes and droughts.

Step 3

Calculate the carbon footprint of one plastic bottle of mass 23.5 g.

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Answer

To calculate the carbon footprint of one plastic bottle, use the formula:

ext{Carbon footprint of one bottle} = rac{6.0 ext{ kg CO}_2}{4.1 ext{ kg plastic}} imes 0.0235 ext{ kg plastic}

Calculating:

ext{Carbon footprint} = rac{6.0}{4.1} imes 0.0235 = 0.0344 ext{ kg CO}_2 ext{ or } 34.4 ext{ g CO}_2

Step 4

Give one way that carbon dioxide emissions can be reduced when a plastic bottle is manufactured.

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Answer

One way to reduce carbon dioxide emissions is to use less plastic in the manufacturing process.

Step 5

Explain how the percentages of nitrogen, oxygen and carbon dioxide in the Earth’s atmosphere today have changed from the Earth’s early atmosphere.

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Answer

In the early atmosphere, nitrogen levels increased due to volcanic activity and the action of bacteria that converted ammonia to nitrogen. Thus, nitrogen levels rose substantially.

Oxygen levels increased as a result of photosynthesis by plants and algae, which produced oxygen as a byproduct. This marked a significant rise in oxygen levels.

Conversely, carbon dioxide levels decreased over time as it was absorbed by oceans and land-based plants, and it became trapped in sediments or converted into fossil fuels and natural gas. This led to a reduction in carbon dioxide concentrations in the atmosphere.

This question is about the Earth's atmosphere - AQA - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 2

Worked Solution & Example Answer:This question is about the Earth's atmosphere - AQA - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 2

What is another greenhouse gas?

Give two effects of global climate change.

Calculate the carbon footprint of one plastic bottle of mass 23.5 g.

Give one way that carbon dioxide emissions can be reduced when a plastic bottle is manufactured.

Explain how the percentages of nitrogen, oxygen and carbon dioxide in the Earth’s atmosphere today have changed from the Earth’s early atmosphere.

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