Year 7 - Science
Cooling
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 and explain what happens to very hot water as it cools.
Key Notes
- The higher the temperature of a hot drink, the faster its particles are moving.
- A hot drink makes the particles in the air around it move more quickly.
- The particles of a hot drink begin to move less quickly as they transfer energy to the air particles.
- The greater the temperature difference between a hot drink and the air, the faster it cools down.
Vocabulary To Learn
- surroundings: the space around an object
- cooling rate: how quickly the temperature of an object falls
- cooling curve: a line graph that shows how a cooling object's temperature changes with time
- energy: a solid object has energy in its thermal store because its particles are vibrating
- dissipate: to spread out
Common Mistakes To Avoid
- The energy of hot objects disappears (is destroyed) as they cool.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
The higher the temperature of a hot drink, the faster its particles are moving. A hot drink makes the particles in the air around it move more quickly.
2. Define this scientific word and use it in context. 'surroundings'
the space around an object. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: The energy of hot objects disappears (is destroyed) as they cool. Correction: Placing a cup of hot water into a surrounding bowl of cold water that is warmed without the waters mixing demonstrates how surroundings are heated as energy is dissipated.
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