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Matter & Energy

Grade 3 · Building confidence · 8 questions · Version PG-17QKDI6-OIUA

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1.Explain “solution” in your own words.
2.Explain “chemical reaction” in your own words.
3.Explain “evaporation” in your own words.
4.Explain “conductor” in your own words.
5.Explain “condensation” in your own words.
6.Explain “insulator” in your own words.
7.Explain “thermal equilibrium” in your own words.
8.Explain “mixture” 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 “solution” in your own words.a uniform mixture in which one substance dissolves in another
  2. Explain “chemical reaction” in your own words.a process that forms new substances
  3. Explain “evaporation” in your own words.change from liquid to gas at a surface
  4. Explain “conductor” in your own words.a material that transfers heat or electricity easily
  5. Explain “condensation” in your own words.change from gas to liquid
  6. Explain “insulator” in your own words.a material that slows heat or electric transfer
  7. Explain “thermal equilibrium” in your own words.a state in which objects have the same temperature
  8. Explain “mixture” in your own words.two or more substances physically combined

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.