Changing temperature
Lesson 8 / 8
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Waxaan sharxi karaa waxa ku dhaca walxaha (particles) ka samaysan adke ama dareere marka heerkulku isbeddelo.
Introduction
In this lesson: I can describe what happens to the particles that make up a solid or liquid when the temperature changes. If left for long enough, all objects in a room will reach the same temperature as the room. Heating a solid makes its particles vibrate more quickly.
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Quizzes
1. What is the name of the temperature at which water changes from its solid state into its liquid state?
- boiling point
- evaporation point
- Correct answer:melting point
- turning point
2. At what temperature does pure water freeze, compared to the temperature at which pure water melts?
- It freezes at a lower temperature than it melts.
- Correct answer:It freezes at the same temperature as it melts.
- It freezes at a higher temperature than it melts.
3. Which of the following describes the particles in iron in its solid state?
- stationary
- Correct answer:vibrating
- Correct answer:fixed in place
- not fixed in place
1. What does increasing the temperature of a metal in the solid state do to the particles it is made from?
- Nothing, they are fixed in position.
- Makes each one a little bit bigger.
- Correct answer:Makes them vibrate more vigorously.
- Makes them move around more quickly.
2. Why does a solid expand at higher temperatures?
- Its particles change shape.
- Its particles each become a little bit bigger.
- Correct answer:Its particles push each other slightly further apart.
- Some of its particles move to new positions.
3. In how many directions (out of length, width and height) does a metal bar expand when its temperature increases?
- 0
- 1
- 2
- Correct answer:3
4. Two different sized blocks of pure solid water (ice) are removed from a freezer at the same time. Which block of ice melts at the lowest temperature?
- the smaller block
- the larger block
- Correct answer:neither block
5. Why does a liquid expand when it is heated to a higher temperature?
- Its particles change shape.
- Its particles each become a little bit bigger.
- Correct answer:Its particles push each other slightly further apart.
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 3 questions
- Lesson videoLearn
- Exit quizCheck · 5 questions