Choose exam board for KS4 Computer Science (GCSE)
Choose exam board for KS4 English
Choose exam board for KS4 French
Choose exam board for KS4 Geography
Choose exam board for KS4 German
Choose exam board for KS4 History
Choose tier for KS4 Maths
Choose exam board for KS4 Music
Choose exam board for KS4 Physical education (GCSE)
Choose exam board for KS4 Religious education (GCSE)
Choose exam board for KS4 Spanish

      Lesson details

      Learning outcome

      I can explain the causes, scale, and impacts of plastic pollution on people and the environment.

      Key learning points

      1. Most plastic is made from fossil fuels and is not biodegradable.
      2. Plastic production has grown rapidly since the 1950s.
      3. Plastic waste pollutes land, rivers, and oceans.
      4. Microplastics enter food chains and may harm human health.
      5. Wildlife can be injured or killed by plastic waste.

      Keywords

      • Biodegradable - material or substance that can break down naturally over time by the action of bacteria, fungi or other living organisms

      • Microplastic - tiny pieces of plastic, usually smaller than five millimetres, that either come from the breakdown of larger plastic items or are made that size

      • Ocean garbage patch - a large area of the ocean where plastic and other waste collects, trapped by circular ocean currents

      Common misconception

      Plastic will eventually biodegrade, even if it takes hundreds of years.

      Plastic is not biodegradable, it just breaks down into smaller and smaller pieces and eventually turns into microplastics (tiny plastic pieces, smaller than 5 mm).

      Teacher tip

      Ask students to think of how they could use less plastic (for example using refillable water bottles).

      Licence

      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

      Loading...

      Prior knowledge starter quiz

      6 Questions

      Q1.
      What does "Anthropocene" mean?

      Correct answer: A new era of major human impact
      The time when the dinosaurs lived
      A future where robots control Earth
      A natural time of stable climate

      Q2.
      Which of these activities increases atmospheric CO₂?

      Planting trees
      Cycling to school
      Correct answer: Burning fossil fuels
      Recycling paper

      Q3.
      Why is biodiversity important in ecosystems?

      It helps internet speeds
      It increases pollution
      It reduces rainfall
      Correct answer: It keeps ecosystems healthy

      Q4.
      What is one visible sign of the Anthropocene from space?

      Correct answer: City lights
      Mountain ranges
      Moon craters
      Tornadoes

      Q5.
      Which human action directly affects the geosphere?

      Driving on a motorway
      Wearing sunglasses
      Watching TV
      Correct answer: Mining

      Q6.
      Which part of Earth is most affected by plastic pollution?

      Biosphere
      Correct answer: Hydrosphere
      Geosphere
      Atmosphere

      4 Questions

      Q1.
      Match the keywords to their definition.

      Correct Answer:Biodegradeable,Breaks down naturally over time

      Breaks down naturally over time

      Correct Answer:Microplastic,Tiny plastic pieces under 5 mm

      Tiny plastic pieces under 5 mm

      Correct Answer:Ocean garbage patch,Area of sea where waste collects

      Area of sea where waste collects

      Q2.
      Which of these materials is not biodegradable?

      Banana peel
      Cotton T-shirt
      Correct answer: Plastic bottle
      Cardboard box

      Q3.
      Why are ocean garbage patches difficult to clean up?

      They're on land
      The plastic is easy to recycle
      They are cleaned every year
      Correct answer: The plastic floats and spreads out

      Q4.
      What happens to most plastic that is not recycled?

      It disappears in the air
      It is eaten by birds
      It turns into metal
      Correct answer: It stays in the environment

      To help you plan your 9 geography lesson on: Plastic pollution, download all teaching resources for free and adapt to suit your pupils' needs...