Cooling | Science | Quizalize & Oak National Academy

Starter quiz

In a piece of pure copper, what is there in the tiny gaps between particles of copper?
- air
- liquid copper
- nothing ✓
- solid copper
Starting with the slowest, sort the following states of matter of water in order of increasing speed of the particles of water in each.
- 1
  
  ⇔
  
  ice (solid state of water)
- 2
  
  ⇔
  
  water (liquid state of water)
- 3
  
  ⇔
  
  steam (gas state of water)
Which of the following options help to prevent a thermometer falling onto the floor between measurements in an investigation?
- Holding it in a clamp and stand. ✓
- Putting it in a tray. ✓
- Resting it against the side of a beaker.
- Using a triangular plastic cap on the end of it. ✓
Starting with the weakest, sort the following states of matter of iron in order of increasing strength of the force holding particles together.
- 1
  
  ⇔
  
  gas state of iron
- 2
  
  ⇔
  
  liquid state of iron
- 3
  
  ⇔
  
  solid state of iron
What is the approximate temperature of a classroom?
- 10°C
- 20°C ✓
- 30°C
- 40°C
Match each of the following examples to the correct temperature.
- the core temperature of a human
  
  ⇔
  
  37°C ✓
- a hot shower
  
  ⇔
  
  41°C ✓
- a hot cup of tea
  
  ⇔
  
  83°C ✓
- an ice cube in a freezer
  
  ⇔
  
  -8°C ✓
- the North Sea
  
  ⇔
  
  6°C ✓

Exit quiz

When boiling water is poured from a kettle into a mug, why is the temperature of the water in the mug always less than 100°C?
- The mug does not have a lid.
- The mug does not have a heating element.
- There is less water in the mug than the kettle.
- The boiling water cools as it heats up the mug. ✓
Which of the following describes a cooling rate?
- Decrease in temperature in one minute. ✓
- Increase in temperature in one hour.
- Decrease in temperature from start to finish.
- Increase in temperature from start to finish.
A cooling curve shows how a cooling object's temperature changes with ______.
- 'time' ✓
What does a steeper line on a cooling curve tell you about how quickly the temperature of a substance is falling?
- The steeper the line, the faster the temperature is falling. ✓
- The steeper the line, the slower the temperature is falling.
- The steepness of the line does not show how quickly the temperature is falling.
Raising the temperature of water increases the amount of __________ it has.
- energy ✓
- heat
- particles
- power
When an object cools down, its energy is ______ into the surroundings.
- 'dissipated' ✓

Worksheet

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Lesson Details

Key learning 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.
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.

Common misconception

The energy of hot objects disappears (is destroyed) as they cool.

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.

Keywords

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