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Matter & Energy

Grade 1 · On-level practice · 8 questions · Version PG-O4M64U-1FMI

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1.Explain “liquid” in your own words.
2.Explain “mixture” in your own words.
3.Explain “gas” in your own words.
4.Explain “heat” in your own words.
5.Explain “solid” in your own words.
6.Explain “condensation” in your own words.
7.Explain “insulator” in your own words.
8.Explain “solution” in your own words.

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 1
  1. Explain “liquid” in your own words.matter with a definite volume but changing shape
  2. Explain “mixture” in your own words.two or more substances physically combined
  3. Explain “gas” in your own words.matter with no definite shape or volume
  4. Explain “heat” in your own words.energy transferred because of a temperature difference
  5. Explain “solid” in your own words.matter with a definite shape and volume
  6. Explain “condensation” in your own words.change from gas to liquid
  7. Explain “insulator” in your own words.a material that slows heat or electric transfer
  8. Explain “solution” in your own words.a uniform mixture in which one substance dissolves in another

Worked example

Track matter and energy before and after a change.

Common mistake

Assuming matter disappears when it changes form.

Helpful hint

Identify the system and follow what enters, leaves, or transforms.