Year 4

What are melting points and boiling points?

In this lesson, we will learn about how scientists measure temperature, two major 'fixed points' of a substance (melting and boiling point) and how we can determine the state of matter of a substance at a particular temperature when given these fixed points.

Year 4

What are melting points and boiling points?

In this lesson, we will learn about how scientists measure temperature, two major 'fixed points' of a substance (melting and boiling point) and how we can determine the state of matter of a substance at a particular temperature when given these fixed points.

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Lesson details

Key learning points

  1. Describe what is meant by melting point and boiling point
  2. Describe how it is possible to measure the melting point and boiling point of a substance
  3. Suggest which state of matter a substance will be in given its temperature

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5 Questions

Q1.
Which change of state occurs when a solid becomes a liquid?
Boiling
Condensing
Freezing
Correct answer: Melting
Q2.
Which state changes occurs when a gas becomes a liquid?
Boiling
Correct answer: Condensing
Freezing
Melting
Q3.
When a solid is cooled the particles...
slide past each other
stop moving
Correct answer: vibrate less
vibrate more
Q4.
When a liquid boils the particles...
move closer together
Correct answer: move further apart
stop moving
vibrate in fixed positions
Q5.
When gases condense the particles...
Correct answer: move closer together
move further apart
stop moving
vibrate in fixed positions

5 Questions

Q1.
Under standard conditions a substance will always melt at the same temperature. True or False?
False
Correct answer: True
Q2.
Particles in a liquid...
are far apart.
Correct answer: can slide past each other.
do not move.
vibrate on the spot.
Q3.
Particles in a solid...
are far apart.
can slide past each other.
do not move.
Correct answer: vibrate on the spot.
Q4.
If the temperature is below a substances melting point it is...
a gas.
a liquid.
Correct answer: a solid.
Q5.
If the temperature is above a substances boiling point it is...
Correct answer: a gas.
a liquid.
a solid.