Year 11 - Science
Burning hydrocarbons
Atmosphere and changing climate
Study Hub
Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores the composition and evolution of Earth's atmosphere, evidence of climate change, and effects of pollutants like sulphur dioxide. It highlights scientific explanations, ethical considerations, risk evaluation, and the role of peer review in communication.
Lesson Summary
You will learn to write balanced symbol equations for combustion reactions, and describe the difference between complete and incomplete combustion.
Key Notes
- Combustion is the chemical combination of a substance with oxygen, involving the production of heat and light.
- Complete combustion of fuels (like hydrocarbons) involve the production of carbon dioxide and water.
- The chemical test for oxygen is a combustion reaction, involving relighting a glowing splint.
- Incomplete combustion produces carbon particulates (soot) and carbon monoxide due to reduced oxygen levels.
Vocabulary To Learn
- combustion: Combustion is an exothermic reaction where a substance reacts with oxygen.
- complete combustion: The complete combustion of fuels, such as hydrocarbons, occurs when enough oxygen is present to convert all the fuel into carbon dioxide and water.
- hydrocarbons: Hydrocarbons are compounds containing only hydrogen and carbon atoms.
- incomplete combustion: Incomplete combustion is when a substance reacts only partially with oxygen, such as when carbon burns in air, producing carbon dioxide, carbon monoxide and soot (unburnt carbon).
Common Mistakes To Avoid
- All combustion is complete, producing only CO₂ and water.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Combustion is the chemical combination of a substance with oxygen, involving the production of heat and light. Complete combustion of fuels (like hydrocarbons) involve the production of carbon dioxide and water.
2. Define this scientific word and use it in context. 'combustion'
Combustion is an exothermic reaction where a substance reacts with oxygen. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: All combustion is complete, producing only CO₂ and water. Correction: Highlight the differences between complete and incomplete combustion.
More Lessons In This Unit
- Acid rain and chemical weathering Study Guide
- Atmospheric pollutants Study Guide
- Carbon dioxide in the atmosphere Study Guide
- Earth's atmosphere Study Guide
- Earth's atmosphere (approximate values) Study Guide
- Evolution of Earth's atmosphere Study Guide
- Global climate change and the effects Study Guide
- Greenhouse gases Study Guide
- Human activity and climate change Study Guide
- Ozone layer: a story of global success Study Guide
Browse all guides in the Year 11 Science guide library.