Try this investigation to get learners making predictions and observing how materials change when they freeze

This resource is also available in Welsh and Irish

This experiment focuses on freezing different liquids. First watch the video of the ‘intriguing ice’ demonstration, then find out how you can get your learners freezing different liquids and thinking about the properties of solids and liquids. 

Learning objectives

  • To describe the properties of solids, liquids and gases.
  • To understand that materials change state when they are cooled.

Enquiry skills:

  • To practise making predictions, observing and recording changes that occur over a period of time, and interpreting and communicating results.

Watch the video

The video demonstration below shows how to carry out the ‘intriguing ice’ demonstration.

Source: Royal Society of Chemistry

Freeze different liquids to demonstrate the effects with your primary students.

Download the supporting materials

Set up and run the investigation with your class using the teacher notes and classroom slides, featuring a full equipment list, method, key words and definitions, questions for learners, FAQs and more.

Teacher notes

PDF | Editable Word document

Classroom slides

PDF | Editable PowerPoint document


What do learners need to know first?

Learners should be able to compare and group materials according to whether they are solids, liquids or gases.

Equipment list

  • Access to a freezer
  • Plastic beakers
  • Spoons
  • Water
  • Salt
  • Sugar
  • Food colouring
  • Fizzy drink
  • A variety of liquids that learners can handle and freeze, eg shampoo, vinegar, cooking oil, fruit juices and honey

Access to freezer – this could be in a staff room, school kitchen or at home. Note that there is no risk to health because none of the liquids that will be frozen are unfit for human consumption.

Additional resources