Changes of state resources

Task: Answer three questions. Assessment focus: condensation.

Using provided data students decide which of three liquids would freeze if placed in a freezer. Students explain what happens to particles when they freeze and how the level changes due to freezing.

Students identify the changes of state that are occurring in a diagram showing the separation of fresh water from seawater.

The liquid range for four common substances has been provided. Students use this to answer questions about melting point, boiling point, and state.

Students decide whether four statements about particular nature of matter are true or false and then give a reason for their answer.

Task: Describe what happens to ice in a glass of water, giving reasons, and explain where water forming on the outside of the glass comes from. Assessment focus: changes of state.

Task: describe what would happen to four items of food when left in the sun. Assessment focus: change.

This task assesses student ability to find the text features of an explanation of a scientific idea.