♻️ The Carbon Cycle
Explore how carbon moves through Earth's atmosphere, living organisms, soil, and water in this Grade 7 biology quiz. Learn how photosynthesis and respiration drive carbon exchange, the role of decomposers in breaking down organic matter, and how fossil fuels form and impact our atmosphere. This quiz covers both short-cycle (fast) and long-cycle (slow) carbon processes, including methane and combustion. **What you'll learn:** - How photosynthesis and respiration transfer carbon between organisms and the atmosphere - The role of decomposers in the carbon cycle - How fossil fuels form and what happens when they burn - The difference between short-cycle and long-cycle carbon processes - How human activities affect atmospheric carbon dioxide levels
Questions in this quiz
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- Question 1
Which process removes carbon dioxide from the atmosphere and stores it as glucose in plant tissues?
- Question 2
What is the primary role of decomposers like bacteria and fungi in the carbon cycle?
- Question 3
Respiration in animals and plants releases carbon dioxide into the atmosphere.
- Question 4
Which of the following best describes a short-cycle carbon process?
- Question 5
Coal and oil are formed from organic matter that was buried underground millions of years ago. This process is an example of which cycle?
- Question 6
When coal is burned in a power plant, it releases carbon dioxide that was stored underground for millions of years into the atmosphere.
- Question 7
How does methane contribute to carbon cycling and climate change?
- Question 8
Which human activity most directly increases atmospheric carbon dioxide in the short term?
- Question 9
Plants do not release carbon dioxide because they only perform photosynthesis.
- Question 10
In the carbon cycle, what happens to carbon dioxide after it dissolves in ocean water?
- Question 11
Which of the following statements correctly describes the relationship between photosynthesis and respiration in the carbon cycle?
- Question 12
What role do consumers (like herbivores and carnivores) play in the carbon cycle?
- Question 13
Deforestation can increase atmospheric carbon dioxide because fewer trees are available to absorb CO₂ through photosynthesis.
- Question 14
Which process is responsible for converting dead organisms in oxygen-poor environments (like swamps) into fossil fuels over millions of years?
- Question 15
How does increased atmospheric carbon dioxide affect the carbon cycle's balance?
- Question 16
Which of the following best explains why soil contains carbon compounds?