Melting: melting points and freezing points
Lesson 6 / 7
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Waxaan awoodi karaa inaan cabbiro heerkulka dhalaalidda iyo heerkulka qaboobidda walax.
Introduction
In this lesson: I can measure the melting point and freezing point of a substance. When it melts, a substance changes from the solid state to the liquid state. When it freezes, a substance changes from the liquid state to the solid state.
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Quizzes
1. What are the three states of matter?
- Hot, Cold, Warm
- Water, Ice, Steam
- Correct answer:Solid, Liquid, Gas
2. In which state of matter are particles in a fixed position and can only vibrate?
- Liquid state
- Gas state
- Correct answer:Solid state
3. Which state of matter takes the shape of its container?
- Gas state
- Solid state
- Correct answer:Liquid state
4. What is the primary reason that a substance in the solid state does not flow like a substance in the liquid state?
- The particles are too large
- The particles are too small
- Correct answer:The forces of attraction between particles are stronger
1. At what point is a substance in its solid state?
- Above its melting point
- Correct answer:Below its melting point
- Above its freezing point
2. If a substance has a melting point of 50°C, at what temperature will it freeze?
- -10°C
- 0°C
- 48°C
- Correct answer:50°C
- 100°C
3. A substance has a melting/freezing point of 25°C. If a sample of this substance is in a container at 25°C, which of the following statements is most accurate?
- The substance must be entirely in the solid state.
- The substance must be entirely in the liquid state.
- Correct answer:The substance could be in the solid or liquid state, or both simultaneously.
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 4 questions
- Lesson videoLearn
- Exit quizCheck · 3 questions