All Activities
Science

The Science of Climate Change

Overview

Students explore the physical science behind climate change and examine the evidence that human activity is driving current warming.

Learning Objective
Students understand the scientific mechanism of the greenhouse effect and can distinguish between natural climate variation and human-caused climate change.

Resources needed

  • None

Lesson stages

0 / 7 done
  1. 1 Ask: what is the difference between weather and climate? (Weather is short-term; climate is long-term average).
  2. 2 Introduce the greenhouse effect: the Sun warms the Earth; some heat radiates back toward space; greenhouse gases absorb this heat and re-radiate it — warming the atmosphere.
  3. 3 Key greenhouse gases: carbon dioxide, methane, water vapour.
  4. 4 Ask: has the Earth always had a greenhouse effect? (Yes — without it the Earth would be frozen).
  5. 5 Introduce the enhanced greenhouse effect: humans burning fossil fuels release extra CO2, intensifying the effect.
  6. 6 Present evidence: rising CO2 levels, rising average temperatures, melting ice caps, rising sea levels.
  7. 7 Ask: what distinguishes current warming from natural climate variation? (Speed — current change is far faster than any natural cycle).

Tap a step to mark it as done.

Variations

  • Model the greenhouse effect: two bottles in sunlight — one with extra CO2 (from bicarbonate and vinegar), one without. Measure temperature difference.
  • Graph CO2 concentration over time using real data — identify the acceleration after industrialisation.
  • Discuss feedback loops: melting permafrost releases methane, which accelerates warming further.
More information

Teach: greenhouse effect, greenhouse gas, carbon dioxide, methane, fossil fuel, feedback loop, evidence. The distinction between the natural greenhouse effect (essential) and the enhanced greenhouse effect (human-caused) is crucial.

Focus on the greenhouse effect mechanism before connecting it to human activity and evidence.

Can students explain the greenhouse effect mechanism in their own words? Can they identify at least three pieces of evidence for human-caused climate change?

The bottle experiment requires only bottles, vinegar, and bicarbonate of soda. No resources needed for the conceptual content.

Students often confuse climate change with ozone depletion. These are separate problems: ozone depletion is caused by CFCs; climate change is caused by greenhouse gases trapping heat.

Understanding the science of climate change is essential for informed citizenship.

Activity details
Secondary Medium 25 minutes no prep Whole Class, Small Group Indoor & Outdoor
Topics
Climate Change Greenhouse Effect Global Warming