plumiWhat is the evidence for climate change, why is it occurring?: OCR GCSE Combined Science B questions
Every OCR GCSE Combined Science B exam question on C1.3 What is the evidence for climate change, why is it occurring?, 2018–2025, with its mark scheme and examiner’s report.
Paper
All papers
Exam
All years
Calculations
Q2(a)(i)
The whole paper ↗
Q2(a)(ii)
The whole paper ↗Q2(b)
The whole paper ↗Q2(c)(i)
The whole paper ↗Q2(c)(ii)
The whole paper ↗Q10(b)
The whole paper ↗
Q1(b)
The whole paper ↗
Q5(a)
The whole paper ↗
Q5(b)(i)
The whole paper ↗Q5(b)(ii)
The whole paper ↗Q5(b)(iii)
The whole paper ↗Q5(b)(iv)
The whole paper ↗Q8(d)(i)
The whole paper ↗Q8(d)(ii)
The whole paper ↗Q7(b)(i)
The whole paper ↗Q7(b)(ii)
The whole paper ↗Q7(b)(iii)
The whole paper ↗Q7(c)
The whole paper ↗Q7(d)(ii)
The whole paper ↗Q7(a)
The whole paper ↗
All 24 questions on What is the evidence for climate change, why is it occurring?, as a list
- June 2024, Chemistry Paper 2 Foundation, Q2(a)(i) (2 marks): Complete the sentence to describe how the presence of carbon dioxide in the atmosphere causes an increase in global temperatures. Put a ring around each correct
- June 2024, Chemistry Paper 2 Foundation, Q2(a)(ii) (1 mark): Name one other greenhouse gas. [1]
- June 2024, Chemistry Paper 2 Foundation, Q2(b) (1 mark): One method to reduce the amount of carbon dioxide in the atmosphere is called carbon capture. Carbon dioxide from power stations is collected and buried deep un
- June 2024, Chemistry Paper 2 Foundation, Q2(c)(i) (1 mark): Who carries out a peer review? Tick (✓) one box. Members of the public. Other scientists. The media. [1]
- June 2024, Chemistry Paper 2 Foundation, Q2(c)(ii) (1 mark): Why is peer review important? Tick (✓) one box. To make sure it is cost effective. To make sure it will be popular. To make sure results can be repeated. [1]
- June 2023, Chemistry Paper 2 Foundation, Q10(b) (4 marks): The combustion of fossil fuels produces carbon dioxide. Most scientists now accept that recent climate change can be explained by increased carbon dioxide emiss
- June 2023, Chemistry Paper 6 Higher, Q1(b) (4 marks): The combustion of fossil fuels produces carbon dioxide. Most scientists now accept that recent climate change can be explained by increased carbon dioxide emiss
- November 2021, Chemistry Paper 6 Higher, Q5(a) (3 marks): Explain how carbon dioxide causes the greenhouse effect. Include ideas about radiation from the Sun. [3]
- November 2021, Chemistry Paper 6 Higher, Q5(b)(i) (2 marks): Complete equation 1 by adding the missing state symbols. [2]
- November 2021, Chemistry Paper 6 Higher, Q5(b)(ii) (1 mark): Equation 1 shows an equilibrium reaction. What does the symbol mean? [1]
- November 2021, Chemistry Paper 6 Higher, Q5(b)(iii) (2 marks): The pH of seawater is 7.5. The reaction in equation 1 causes the pH of seawater to change. Explain how and why the pH changes. [2]
- November 2021, Chemistry Paper 6 Higher, Q5(b)(iv) (2 marks): Ling does an experiment. She bubbles carbon dioxide through water. She uses this apparatus. Carbon dioxide gas Suggest two methods for showing that the pH of th
- November 2021, Combined Science Paper 8 Higher, Q8(d)(i) (2 marks): Give two conclusions that can be made about global temperature change over time. 1. 2. [2]
- November 2021, Combined Science Paper 8 Higher, Q8(d)(ii) (2 marks): Suggest what Fig. 8.2 shows about the role of humans in global temperature change over time. [2]
- November 2020, Combined Science Paper 4 Foundation, Q7(b)(i) (3 marks): Describe the trend shown in Fig. 7.1 and suggest two possible explanations for this trend. Trend Explanation 1 Explanation 2 [3]
- November 2020, Combined Science Paper 4 Foundation, Q7(b)(ii) (1 mark): Give one reason why the data in Fig. 7.1 may be inaccurate. [1]
- November 2020, Combined Science Paper 4 Foundation, Q7(b)(iii) (2 marks): Describe two effects of the trend seen in Fig. 7.1. Effect 1 Effect 2 [2]
- November 2020, Combined Science Paper 4 Foundation, Q7(c) (2 marks): Carbon capture and storage is a process where carbon dioxide is collected and stored underground. Suggest two negative effects of carbon capture and storage on
- November 2020, Combined Science Paper 4 Foundation, Q7(d)(ii) (2 marks): Biofuels are carbon neutral. This means that their use does not increase carbon dioxide levels in the atmosphere. Coal is not carbon neutral. Which two statemen
- November 2020, Chemistry Paper 6 Higher, Q7(a) (1 mark): Describe the relationship between the concentration of carbon dioxide in the atmosphere and the total world carbon emissions from fossil fuels, shown by Fig. 7.
- November 2020, Chemistry Paper 6 Higher, Q7(b) (2 marks): Scientists are developing ways of reducing the concentration of carbon dioxide in the atmosphere, because of the link between increased greenhouse gas emissions
- November 2020, Chemistry Paper 6 Higher, Q7(c)(i) (3 marks): Discuss the use of electric cars as a way of reducing the concentration of carbon dioxide in the atmosphere. [3]
- November 2020, Chemistry Paper 6 Higher, Q7(c)(ii) (4 marks): Mia drives 15 000 km in her car each year. She used to drive a car which burned 1200 kg of petrol each year. Each kilogram of petrol produced 2.1 kg of carbon d
- November 2020, Combined Science Paper 8 Higher, Q1(d)(ii) (2 marks): Biofuels are carbon neutral. This means that their use does not increase carbon dioxide levels in the atmosphere. Coal is not carbon neutral. Which two statemen
Questions, mark schemes and examiner’s reports are © OCR, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Full past papers.
Rather write your answers by hand on iPad? Plumi marks them against the same mark schemes.