Year 7 - Science
Energy and temperature
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 describe the difference between the temperature and the energy of an object or substance.
Key Notes
- The directions in which particles in a substance move are random. This is true of solids, liquids and gases.
- The higher the temperature, the faster the particles vibrate in a solid or move past each other in a liquid or gas.
- Energy needs to be transferred to an object to raise its temperature.
- For two identical objects, the one at a higher temperature has more energy.
- For two objects made of the same substance at the same temperature, the one with more particles has more energy.
Vocabulary To Learn
- random: something that happens or is chosen without any specific pattern, reason, or plan, like whether a coin flip will land heads up or tails up
- temperature: a measure of how hot something is
- thermal energy store: the energy a substance stores because of the random motion of its particles
Common Mistakes To Avoid
- Energy and temperature are the same thing.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
The directions in which particles in a substance move are random. This is true of solids, liquids and gases. The higher the temperature, the faster the particles vibrate in a solid or move past each other in a liquid or gas.
2. Define this scientific word and use it in context. 'random'
something that happens or is chosen without any specific pattern, reason, or plan, like whether a coin flip will land heads up or tails up. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Energy and temperature are the same thing. Correction: Warm different amounts of water in identical kettles for the same time to show they reach different temperatures for the same energy transferred.
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