The effect of adding salt to ice: plan (non-statutory)
I can plan an investigation into the effect of adding salt to ice.
The effect of adding salt to ice: plan (non-statutory)
I can plan an investigation into the effect of adding salt to ice.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Rock salt is often stored in a public grit bin and used to melt ice on roads and pavements.
- After being extracted, rock salt usually undergoes processing and crushing before it is transported to grit bins.
- Scientists plan investigations to make comparisons and answer questions.
- Variables can be changed, measured or kept the same in a comparative test.
Keywords
Rock salt - Rock salt is the name given to salt before it is processed.
Grit - Rock salt is a brown colour and looks like gravel, so it is often referred to as grit.
Melt - To melt is to change from a solid state to a liquid state.
Comparative test - In a comparative test, the thing that is being changed has labels, such as the types of materials.
Variable - Variables are the things that can be changed, measured or kept the same in a comparative test.
Common misconception
Pupils may think that there is only one type of salt.
Explanation that rock salt is one type of salt.
Equipment
Rock salt, baking tray, access to a freezer and water - for planning purposes only. Pupils will carry out the investigation in the follow-up lesson 3 of this unit.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
Exit quiz
6 Questions
