The Carbon Cycle

Question 1

Explain the purpose of the carbon cycle

“The carbon cycle regulates…”

Answer 1

The carbon cycle regulates Earth’s carbon levels, balancing atmospheric CO₂ through processes like photosynthesis and respiration.
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Question 2

Define carbon source and provide examples

Answer 2

Carbon source is any process that releases CO₂ into the atmosphere (e.g., burning fossil fuels, deforestation).

Question 3

Label a diagram of the carbon cycle

Question 4

Explain the role/effects of photosynthesis and plants in the carbon cycle

Answer 4

Photosynthesis removes CO₂ from the atmosphere and releases oxygen. Plants act as carbon sinks, helping regulate the carbon cycle and reduce climate change effects.

Question 5

Write the worded chemical equation for photosynthesis and cellular respiration (identify the reactants and products)

Answer 5

Photosynthesis:
Carbon dioxide + Water + Light energy → Glucose + Oxygen
Respiration:
glucose + oxygen → carbon dioxide + water + Energy

Question 6

Explain the role/effects of decomposition, combustion, and deforestation in the carbon cycle

Answer 6

1. Decomposition: Breaks down organic matter, releasing CO₂.
2. Combustion: Burning fossil fuels releases CO₂.
3. Deforestation: Reduces the number of trees that can absorb CO₂.

Question 7

Describe the different methods for removing/returning carbon dioxide from/to the atmosphere

Answer 7

Removing:
* Planting trees
* reducing fossil fuel use
* carbon capture technologies

Returning:
* respitation
* decompisation
* volcanic activity