Science
Matter & Materials
Conceptual
12–14 yrs
Earth's Atmosphere & CO2
地球大气层与二氧化碳
Description
Describe the composition of Earth's atmosphere (mainly nitrogen and oxygen, with small amounts of CO₂ and other gases), explain how human activity increases CO₂, and describe the impact on global climate
Mastery Evidence
- States the approximate percentages of nitrogen, oxygen, CO₂, and argon in the atmosphere
- Explains how burning fossil fuels and deforestation increase atmospheric CO₂
- Describes the greenhouse effect and how it leads to climate change
- Discusses one specific consequence of climate change (e.g. rising sea levels, extreme weather)
Assessment Prompt
If your child was asked why scientists are worried about CO₂ levels rising, could they explain what CO₂ does in the atmosphere, why human activities produce more of it, and what effects it's having on the planet?
