Science
Ecosystems & Habitats
Conceptual
12–13 yrs
The Carbon Cycle
碳循环
Description
Describe the carbon cycle, tracing carbon through photosynthesis, respiration, feeding, decomposition, and combustion, and explain the role of each process
Mastery Evidence
- Draws or labels a diagram of the carbon cycle showing the main processes
- Explains how photosynthesis removes carbon dioxide from the atmosphere
- Explains how respiration, combustion, and decomposition return carbon dioxide to the atmosphere
- Discusses how human activities (burning fossil fuels, deforestation) disrupt the carbon cycle
Assessment Prompt
If your child was asked where the carbon in a wooden table came from originally, could they trace its journey through the carbon cycle — from the atmosphere, through a plant, into the tree, and back out again?
