Year 5 - Science
Removing salt from seawater (non-statutory)
Properties, changes and separating materials
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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 explores the properties of everyday materials, including hardness, solubility, and conductivity. It covers reversible changes like dissolving and mixing, and irreversible changes such as burning. Emphasis is on scientific enquiries, data recording, and presenting findings with evidence.
Lesson Summary
You will learn to investigate ways of making seawater safe to drink.
Key Notes
- The water in our seas and oceans contains salt. This water is not safe for drinking.
- Evaporation can be used to remove the water from a salt solution.
- Condensation is when a water in the gas state (water vapour) is cooled so that it changes to water in the liquid state.
- Scientists and engineers investigate ways of making seawater safe to drink using evaporation and condensation.
- Microorganisms must also be removed from water to make it safe to drink.
Vocabulary To Learn
- seawater: Seawater is water from a sea or ocean.
- solution: Some solids dissolve in liquids to form a solution.
- evaporation: Evaporation is the change of state from a liquid to a gas.
- condensation: Condensation is the change of state from a gas to a liquid.
- desalination: Desalination is the process of removing salt from seawater.
Common Mistakes To Avoid
- Saltwater is safe to drink.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
The water in our seas and oceans contains salt. This water is not safe for drinking. Evaporation can be used to remove the water from a salt solution.
2. Define this scientific word and use it in context. 'seawater'
Seawater is water from a sea or ocean. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Saltwater is safe to drink. Correction: Teaching slides will explain that drinking saltwater can make us ill and will explain the process of desalination.
More Lessons In This Unit
- Bioplastics (non-statutory Climate Change & Sustainability) Study Guide
- Burning plants as fuel (non-statutory Climate Change & Sustainability) Study Guide
- Burning: an irreversible change Study Guide
- Everyday uses of thermal insulators Study Guide
- Greenhouse gases (non-statutory Climate Change & Sustainability) Study Guide
- How scientists work Study Guide
- Insulating our homes and schools (non-statutory Climate Change & Sustainability) Study Guide
- More irreversible changes Study Guide
- More reversible changes Study Guide
- Properties of materials Study Guide
- Providing safe drinking water (non-statutory Climate Change & Sustainability) Study Guide
- Recovering insoluble solids Study Guide
- Reversible changes of state Study Guide
- Rusting: an irreversible change Study Guide
- Separating soluble solids from solutions Study Guide
- Soluble and insoluble Study Guide
- Thermal insulators: do and review Study Guide
- Thermal insulators: plan Study Guide
- Uses of everyday materials Study Guide
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