Year 9 - Geography
Threats to oceans
Anthropocene: What is the impact of humans on the world?
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit teaches pupils about how humans have affected our world by looking at environmental issues such as plastic pollution and the impact of fossil fuel use. The unit leads pupils to question whether we are in a new geological epoch.
Lesson Summary
You will learn to explain the main threats to oceans and how they affect marine environments.
Key Notes
- Plastic pollution harms marine life and spreads through ocean currents.
- Overfishing reduces fish populations and disrupts marine food chains.
- Climate change warms oceans and causes coral bleaching.
- Oil spills and chemical pollution damage marine ecosystems.
- Rising sea levels and acidification threaten coastal and ocean habitats.
Vocabulary To Learn
- ocean current: continuous movements of seawater in the ocean
- overfishing: catching too many fish, so the breeding population becomes too depleted to recover
- food chain: a sequence that shows how a group of living things are linked by what they eat
- ocean acidification: when the ocean becomes more acidic because it absorbs too much CO₂ from the air
Common Mistakes To Avoid
- Ocean acidification is when water is polluted from human activities on land.
3 Quick Questions (With Answers)
1. Explain this geography topic using two clear key points.
Plastic pollution harms marine life and spreads through ocean currents. Overfishing reduces fish populations and disrupts marine food chains.
2. Define this geography term and use it in an example. 'ocean current'
continuous movements of seawater in the ocean.
3. Correct this common geography misunderstanding.
Mistake: Ocean acidification is when water is polluted from human activities on land. Correction: Ocean acidification is when the ocean absorbs extra carbon dioxide (CO₂) from the air, which makes the water more acidic.
More Lessons In This Unit
- Alternative energy supplies Study Guide
- An introduction to the Anthropocene Study Guide
- Evidence of the Anthropocene Study Guide
- Fieldwork: Analysing, concluding and evaluating air pollution data Study Guide
- Fieldwork: Planning an air pollution enquiry and collecting data Study Guide
- Fieldwork: Presenting air pollution data Study Guide
- Global governance Study Guide
- Our future climate Study Guide
- Phasing out fossil fuels Study Guide
- Plastic pollution Study Guide
- Sustainability: A new way of living Study Guide
- The human impact on ecosystems Study Guide
- The impact of consumption Study Guide
Browse all guides in the Year 9 Geography guide library.