Lesson Worksheet: Changes of State Science

In this worksheet, we will practice describing and explaining changes of state, and identifying these changes through diagrams and heating curves.


Which of the following is not the name for a change of state?

  • AMelting
  • BFreezing
  • CDissolution
  • DVaporization
  • ECondensation


Which category of energy does a substance usually gain or lose to undergo a change of state?

  • AGravitation potential energy
  • BElectrical potential energy
  • CElastic potential energy
  • DThermal energy
  • EMagnetic energy


The diagram below outlines the changes in state between solids, liquids, and gases. What name is given to process X?

  • AVaporization
  • BMelting
  • CSublimation
  • DCondensation
  • EFreezing


In the diagram below, the attractive forces between two molecules in a liquid are indicated by an arrow. The larger the arrow, the stronger the attractive force.

What will these arrows look like if the liquid undergoes a change of state to a gas?

  • A
  • B
  • C


The graph below shows how the temperature of a solid changes over time when heated. The part of the graph marked X indicates the point at which a change of state from a solid to liquid occurs. At this point, the temperature remains constant despite there being continuous heating. What name is given to the heat required for a change of state to occur?

  • APhase heat
  • BSpecific heat
  • CExcess heat
  • DLatent heat
  • ESensible heat


Order the following statements to describe what happens when a solid is heated.

  • A4, 3, 1, 2
  • B4, 1, 3, 2
  • C2, 3, 1, 4
  • D3, 1, 4, 2
  • E1, 4, 2, 3


The diagram below shows the arrangement of particles before and after a change of state. Which change in state is shown in the diagram?

  • ADepositing
  • BMelting
  • CVaporization
  • DCondensation
  • EFreezing


The diagram below outlines the changes in state between solids, liquids, and gases. What name is given to process X?

  • AMelting
  • BSublimation
  • CVaporization
  • DCondensation
  • EFreezing


Three states of matter are shown in containers A, B, and C. What change will occur during the process of melting?

  • AC to B
  • BA to B
  • CB to C
  • DC to A
  • EA to C


The diagram below shows a progressive change of state. Which of the arrows indicates an increase of temperature?

  • AA
  • BB

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