Year 7 - Science
Thermal conductors
Heating and cooling
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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 explains energy transfer between objects due to temperature differences, through conduction or radiation, the role of insulators, and thermal equilibrium. It covers particle arrangements and motions in solids, liquids, and gases and Brownian motion.
Lesson Summary
You will learn to use the idea of vibrating particles to explain heating by thermal conduction.
Key Notes
- The temperature along a thermal conductor increases quickly when it is heated.
- The temperature along a thermal insulator increases very slowly when it is heated.
- In thermal conductors, vibrating particles quickly cause the particles near to them to vibrate as well.
- In thermal insulators, it is hard for vibrating particles to cause the particles near to them to vibrate as well.
Vocabulary To Learn
- thermal conduction: a change in temperature due to particles passing on their motion through their bonds or by particle collisions
- thermal conductor: a substance along which thermal conduction happens quickly
- thermal insulator: a substance along which thermal conduction happens slowly
- forces of attraction: hold together the neighbouring particles in a solid or liquid; these forces are weaker the further apart the particles are
Common Mistakes To Avoid
- Heat is a substance that flows through thermal conductors.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
The temperature along a thermal conductor increases quickly when it is heated. The temperature along a thermal insulator increases very slowly when it is heated.
2. Define this scientific word and use it in context. 'thermal conduction'
a change in temperature due to particles passing on their motion through their bonds or by particle collisions. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Heat is a substance that flows through thermal conductors. Correction: Emphasise that in a solid the particles do not move along the material during thermal conduction and that what we experience as 'heat' is particles in an object vibrating against our skin.
More Lessons In This Unit
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