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Grade 5 · Science · Unit 2 of 9

Mixtures, Changes and Reactions

States of matter, mixtures and chemical change

What your child practises

How matter changes state with temperature, the difference between a mixture, a physical change and a chemical reaction, and why no matter is gained or lost.

Nunavut Curriculum approved guide: NWT Science and Technology K–6 (2004), Physical science · changes of state, mixtures, physical and chemical change, and conservation of matter

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Condensation is a change from…

    • gas to liquid
    • liquid to solid
    • solid to gas

  2. Question 2

    Melting is a change from…

    • solid to liquid
    • gas to liquid
    • liquid to gas

  3. Question 3

    A physical change is one where…

    • the substance stays the same kind of matter
    • a new substance forms
    • matter disappears

  4. Question 4

    Which could be a sign of a chemical reaction?

    • a bigger puddle
    • bubbles of gas and a new smell
    • a change in colour from drawing

  5. Question 5

    At what temperature does pure water freeze (at sea level)?

    • 0 °C
    • 10 °C
    • 100 °C

  6. Question 6

    When you stir sugar into tea, no matter is lost. Where is the sugar?

    • spread evenly through the tea
    • gone completely
    • turned into water

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