Lesson Worksheet: The Carbon Cycle Chemistry

In this worksheet, we will practice describing the key steps of the carbon cycle, including respiration, photosynthesis, combustion, and decomposition.

Q1:

Which of the following is not a process by which carbon leaves the atmosphere?

  • ASeashells forming
  • BGases dissolving in seawater
  • CIndustrial carbon capture
  • DFuels combusting
  • EPlants photosynthesizing

Q2:

What name is given to an organism that releases carbon dioxide into the atmosphere by breaking down dead organic material?

  • AComposter
  • BCarbon dioxider
  • CScavenger
  • DDecomposer
  • EDecayer

Q3:

Carbon is not present in which of the following materials?

  • AFossil fuels
  • BBiofuels
  • CSeashells
  • DPlants
  • EQuartz

Q4:

Which of the following is not a process by which carbon enters the atmosphere?

  • AFuels combusting
  • BPlants and animals decaying
  • CSeashells forming
  • DPlants and animals respiring
  • EWeathering from acid rain

Q5:

Which of the following processes does not add CO2 to the atmosphere?

  • ARespiration
  • BDecomposition
  • CCombustion
  • DVolcanic eruptions
  • EPhotosynthesis

Q6:

Which of the following inputs are required by photosynthetic organisms?

  • A2, 4, and 5
  • B1, 3, and 5
  • C4 and 5
  • D1 and 3
  • E1 and 2

Q7:

Match the equations to the processes: CH+2OCO+2HOA6CO+6HOCHO+6OBCHO+6O6CO+6HOC422222612626126222()()()

  1. Photosynthesis
  2. Combustion
  3. Respiration
  • AA: 3
    B: 2
    A: 1
  • BA: 2
    B: 1
    C: 3
  • CA: 1
    B: 2
    C: 3
  • DA: 2
    B: 3
    C: 1
  • EA: 1
    B: 3
    C: 2

Q8:

Which process could be represented by the letter X in the diagram?

  • AAnimal respiration
  • BDeath and excretion
  • CCombustion
  • DPlant photosynthesis
  • EDecomposition

Q9:

Which process could be represented by the letter Z in the diagram?

  • ARespiration
  • BDecomposition
  • CDeath and excretion
  • DPhotosynthesis
  • ECombustion

Q10:

Which of the following processes could be represented by the letter Y in the diagram?

  • APlant respiration
  • BCombustion
  • CAnimal respiration
  • DDecomposition
  • EPhotosynthesis

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.