Carbon cycle — Paper 1 · IGCSE Science - Combined 0653

12 In the carbon cycle, several different processes may release carbon dioxide from dead organisms. Which process does not do so? A combustion B decomposition C photosynthesis D respiration

1 marks

Answer: C

This question in 0653/11 May/June 2006

12 The diagram shows the carbon cycle. carbon compounds in the atmosphere 1 6 4 2 fossil fuels carbon compounds 3 carbon compounds 5 in animals in plants carbon compounds in dead organisms Which of the numbered processes represent respiration and photosynthesis? respiration photosynthesis A 3 1 B 4 1 C 5 2 D 6 3

1 marks

Answer: B

This question in 0653/11 Oct/Nov 2006

12 The diagram shows part of the carbon cycle. carbon dioxide in the air 1 6 3 carbon compounds carbon compounds in fossil fuels in animals 4 carbon compounds 2 in plants carbon compounds 5 in dead animals and plants During which stage in the cycle will oxygen be added to the air? A 1 B 3 C 5 D 6

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2008

12 Which process takes carbon dioxide out of the air? A combustion B decomposition C photosynthesis D respiration

1 marks

Answer: C

This question in 0653/11 May/June 2009

13 Deforestation in tropical rain forests can lead to A decreased carbon dioxide in the air. B decreased species diversity. C increased number of habitats. D increased oxygen in the air.

1 marks

Answer: B

This question in 0653/12 May/June 2011

12 Which process takes carbon dioxide out of the air? A combustion B decomposition C photosynthesis D plant respiration

1 marks

This question in 0653/11 May/June 2012

12 The diagram shows part of the carbon cycle. photosynthesis green Y plants animals combustion X What are X and Y? X Y A carbon dioxide oxygen B fossil fuel carbon dioxide C fossil fuel oxygen D oxygen carbon dioxide

1 marks

Answer: B

This question in 0653/12 May/June 2012

12 The diagram shows part of the carbon cycle. photosynthesis green Y plants animals combustion X What are X and Y? X Y A carbon dioxide oxygen B fossil fuel carbon dioxide C fossil fuel oxygen D oxygen carbon dioxide

1 marks

Answer: B

This question in 0653/13 May/June 2012

12 The diagram shows part of the carbon cycle. 1 carbon green dioxide plants 2 animals What are processes 1 and 2? A decomposition and respiration B feeding and photosynthesis C photosynthesis and decomposition D respiration and feeding

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2013

12 The diagram shows part of the carbon cycle. 1 carbon green dioxide plants 2 animals What are processes 1 and 2? A decomposition and respiration B feeding and photosynthesis C photosynthesis and decomposition D respiration and feeding

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2013

13 Which is a greenhouse gas that plants help to remove from the atmosphere? A carbon dioxide B hydrogen C methane D oxygen

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2013

13 Which process absorbs carbon dioxide from the atmosphere? A combustion B decay C photosynthesis D respiration

1 marks

Answer: C

This question in 0653/11 May/June 2014

12 Which process absorbs carbon dioxide from the atmosphere? A combustion B decay C photosynthesis D respiration

1 marks

Answer: C

This question in 0653/13 May/June 2014

13 When fossil fuels are burnt, what is released? ener carbon oxygen gy dioxide yg A J J J B J Wi x c J x J D x Wi J

1 marks

Answer: B

This question in 0653/13 May/June 2015

13 The diagram shows part of the carbon cycle. carbon dioxide in air 3 carbon compounds 4 in animals 1 2 carbon compounds in plants Where does respiration occur? A 1 only B 2 and 3 C 3 and 4 D 3 only

1 marks

Answer: C

This question in 0653/12 Oct/Nov 2015

12 The diagram shows part of the carbon cycle. carbon dioxide in 1 the atmosphere 5 2 fossil fuels 3 4 carbon compounds carbon compounds in animals in plants carbon compounds in dead animals and plants Which are stages that use oxygen and produce oxygen? uses produces oxygen oxygen A 1 2 B 2 3 C 3 4 D 4 5

1 marks

Answer: D

This question in 0653/13 Oct/Nov 2016

13 The diagram shows the carbon cycle. Which arrow represents combustion? D carbon dioxide in air B A fossil fuels carbon compounds in green plants dead plants C and animals carbon compounds in animals

1 marks

Answer: D

This question in 0653/12 May/June 2017

13 The diagram shows the carbon cycle. Which arrow represents combustion? D carbon dioxide in air B A fossil fuels carbon compounds in green plants dead plants C and animals carbon compounds in animals

1 marks

Answer: D

This question in 0653/13 May/June 2017

12 The diagram represents part of the carbon cycle. 1 atmospheric green plants carbon dioxide 2 3 animals 4 microorganisms Which arrows show where respiration takes place? A 1, 3 and 4 B 1 and 3 only C 2, 3 and 4 D 2 and 3 only

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2017

12 The diagram shows part of the carbon cycle. Which arrow represents a process that releases oxygen into the atmosphere? carbon dioxide in the air B A carbohydrates in dead organic matter C D death carbohydrates in animals death carbohydrates in green plants

1 marks

Answer: C

This question in 0653/12 Feb/March 2018

12 The diagram shows part of the carbon cycle. photosynthesis green Y plants animals combustion X What are X and Y? X Y A carbon dioxide oxygen B fossil fuel carbon dioxide C fossil fuel oxygen D oxygen carbon dioxide

1 marks

Answer: B

This question in 0653/11 Oct/Nov 2018

12 The diagram shows part of the carbon cycle. photosynthesis green Y plants animals combustion X What are X and Y? X Y A carbon dioxide oxygen B fossil fuel carbon dioxide C fossil fuel oxygen D oxygen carbon dioxide

1 marks

Answer: B

This question in 0653/12 Oct/Nov 2018

12 The diagram shows part of the carbon cycle. photosynthesis green Y plants animals combustion X What are X and Y? X Y A carbon dioxide oxygen B fossil fuel carbon dioxide C fossil fuel oxygen D oxygen carbon dioxide

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2018

13 The diagram represents the carbon cycle. Which letter represents combustion? A CO2 B D oil C

1 marks

Answer: D

This question in 0653/12 May/June 2019

13 Which row shows the effects of deforestation? concentration of amount of carbon dioxide photosynthesis in atmosphere A less more B less less C more less D more more

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2019

13 The diagram shows part of the carbon cycle. atmospheric carbon dioxide X Z Y green plants microorganisms W animals Which two labelled arrows represent respiration? A W and X B X and Y C Y and Z D Z and W

1 marks

Answer: C

This question in 0653/12 Feb/March 2020

13 What is an undesirable effect of deforestation? A a decrease in flooding B an increase in atmospheric carbon dioxide C an increase in the number of habitats for organisms D an increase in the number of species

1 marks

Answer: B

This question in 0653/11 May/June 2020

13 The diagram shows part of the carbon cycle. Which arrow represents respiration by decomposers? carbon dioxide in air A B carbon compounds D carbon compounds carbon compounds in dead organisms in living animals in living plants C

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2020

13 The diagram shows part of the carbon cycle. Which arrow represents respiration by decomposers? carbon dioxide in air A B carbon compounds D carbon compounds carbon compounds in dead organisms in living animals in living plants C

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2020

13 The diagram shows part of the carbon cycle. Which arrow represents respiration by decomposers? carbon dioxide in air A B carbon compounds D carbon compounds carbon compounds in dead organisms in living animals in living plants C

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2020

13 Which process in the carbon cycle releases carbon back into the atmosphere? A feeding B fossilisation C photosynthesis D respiration

1 marks

Answer: D

This question in 0653/12 Feb/March 2021

13 Which process takes carbon dioxide out of the air? A combustion B decomposition C photosynthesis D plant respiration

1 marks

Answer: C

This question in 0653/11 May/June 2021

13 Which process takes carbon dioxide out of the air? A combustion B decomposition C photosynthesis D plant respiration

1 marks

Answer: C

This question in 0653/12 May/June 2021

13 Which process takes carbon dioxide out of the air? A combustion B decomposition C photosynthesis D plant respiration

1 marks

Answer: C

This question in 0653/13 May/June 2021

13 The diagram shows part of the carbon cycle. carbon dioxide in the atmosphere 1 4 2 animals green plants 3 Which row identifies the numbered processes? process 1 process 2 process 3 process 4 A respiration photosynthesis movement photosynthesis B respiration photosynthesis feeding respiration C photosynthesis respiration movement decomposition D photosynthesis respiration feeding respiration

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2021

13 Which labelled box represents plants in the carbon cycle? carbon dioxide in the atmosphere A B C D

1 marks

Answer: C

This question in 0653/12 Feb/March 2022

13 Which process in the carbon cycle releases carbon into the environment? A feeding B fossilisation C photosynthesis D respiration

1 marks

Answer: D

This question in 0653/11 May/June 2022

13 The diagram shows part of the carbon cycle. CO2 X Which process is the arrow marked X? A combustion B fossilisation C photosynthesis D respiration

1 marks

Answer: A

This question in 0653/12 May/June 2022

13 The diagram shows part of the carbon cycle. Which letter represents combustion? plant CO2 animal D A B oil C fossil

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2022

13 The diagram shows part of the carbon cycle. Which letter represents combustion? plant CO2 animal D A B oil C fossil

1 marks

Answer: D

This question in 0653/13 Oct/Nov 2022

13 Some of the processes involved in the carbon cycle are listed. 1 combustion 2 decomposition 3 fossilisation 4 photosynthesis Which processes release carbon dioxide into the atmosphere? A 1, 2 and 3 B 1 and 2 only C 2, 3 and 4 D 3 and 4 only

1 marks

Answer: B

This question in 0653/12 Feb/March 2023

13 The diagram shows part of the carbon cycle. carbon dioxide in the air 1 3 2 animals plants 4 Which labels represent respiration? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: A

This question in 0653/13 May/June 2023

13 The diagram represents part of the carbon cycle. 1 atmospheric green plants carbon dioxide 2 3 animals 4 decomposers Which arrows show where respiration takes place? A 1, 3 and 4 B 1 and 3 only C 2, 3 and 4 D 2 and 3 only

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2023

13 The diagram shows part of the carbon cycle. Which arrow represents respiration by decomposers? carbon dioxide in air A B carbon compounds D carbon compounds carbon compounds in dead organisms in living animals in living plants C

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2023

13 The diagram shows part of the carbon cycle. Which arrow represents respiration by decomposers? carbon dioxide in air A B carbon compounds D carbon compounds carbon compounds in dead organisms in living animals in living plants C

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2023

13 Some processes in the carbon cycle are listed. 1 combustion 2 fossilisation 3 photosynthesis 4 respiration Which processes release carbon dioxide into the atmosphere? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0653/12 Feb/March 2024

13 The diagram shows part of the carbon cycle. Which arrow represents combustion? D carbon dioxide in air B A fossil fuels carbon compounds in green plants dead plants C and animals carbon compounds in animals

1 marks

Answer: D

This question in 0653/11 May/June 2024

13 The diagram represents the carbon cycle. Which letter represents combustion? A CO2 B D oil C

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2024

13 The diagram shows part of the carbon cycle. carbon dioxide in 1 the atmosphere 2 3 animals plants decomposers 4 dead organisms fossil fuels Which processes are represented by 1, 2, 3 and 4? 1 2 3 4 A photosynthesis respiration respiration combustion B photosynthesis combustion respiration respiration C respiration photosynthesis respiration combustion D respiration combustion photosynthesis respiration

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2024

13 The diagram shows part of the carbon cycle. carbon dioxide in 1 the atmosphere 2 3 animals plants decomposers 4 dead organisms fossil fuels Which processes are represented by 1, 2, 3 and 4? 1 2 3 4 A photosynthesis respiration respiration combustion B photosynthesis combustion respiration respiration C respiration photosynthesis respiration combustion D respiration combustion photosynthesis respiration

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2024

12 Which process in the carbon cycle releases carbon back into the atmosphere? A feeding B formation of fossil fuels C photosynthesis D respiration

1 marks

Answer: D

This question in 0653/12 May/June 2025

13 The diagram represents part of the carbon cycle. carbon dioxide in air 1 3 2 7 animals plants 4 6 5 decomposers Which arrows represent respiration? A 1, 2 and 4 B 1, 2 and 7 C 3, 5 and 6 D 3, 6 and 7

1 marks

Answer: B

This question in 0653/13 May/June 2025