Heating and cooling | Science | Quizalize & Oak National Academy

Starter quiz

What is the state of water at room temperature (about 20°C)?
- Solid
- Liquid ✓
- Gas
Which of these is not a characteristic of a solid state substance?
- Fixed shape
- Cannot be compressed
- Flows easily ✓
- Particles in fixed positions
Water will melt at ______ ℃?
- '0' ✓
In what state does water evaporate ?
- Solid
- Liquid ✓
- Gas
What happens to the volume of a substance when it condenses?
- Increases
- Decreases ✓
- Stays the same
- Becomes zero
How does the energy of particles compare between a block of ice at -10°C and a glass of water at 20°C?
- Higher in the glass of water ✓
- Higher in the block of ice
- The same in both
- Impossible to determine

What type of process is boiling?
- Endothermic ✓
- Exothermic
- Both
- Neither
When energy is transferred out from a substance to its surroundings, this process is termed...
- 'exothermic' ✓
Which thermometer shows the temperature at which water is in the liquid state?
- a
- b
- c ✓
Evaporation is an endothermic process because energy is transferred from the surroundings into the substance.
- True ✓
- False
Match the statements below to what is happening in terms of energy, particle movement and particle arrangement as a substance is heated over time.
- Between A and B
  
  ⇔
  
  particles are in fixed positions, and vibrate more ✓
- Between B and C
  
  ⇔
  
  particles becoming randomly arranged and can move ✓
- Between C and D
  
  ⇔
  
  particles in liquid state move past each other and faster ✓
- Between D and E
  
  ⇔
  
  energy used to overcome liquid particle attractive forces ✓
- Between E and F
  
  ⇔
  
  particles in gas state use energy to move faster ✓
Starting in the liquid state, if a substance's particles increase in energy while its temperature remains constant, what change is happening? Give a one-word answer.
- 'boiling' ✓

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Heating transfers energy into a substance and can cause it to melt, evaporate or boil.
Melting, evaporation and boiling are endothermic.
As it cools, a substance transfers energy into the surroundings by heating and it may condense or freeze.
Condensing and freezing are exothermic.

Energy can appear and disappear.

Remind students about the conservation of energy.

Endothermic - When a substance transfers energy in from the surroundings, e.g. melting, boiling and evaporating.
Exothermic - When a substance transfers energy out to the surroundings by heating, e.g. condensing and freezing.