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Matter & Energy

Grade 5 · Stretch challenge · 8 questions · Version PG-AIOLA-X5CG

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1.Explain “mixture” in your own words.
2.Explain “specific heat” in your own words.
3.Explain “chemical reaction” in your own words.
4.Explain “density” in your own words.
5.Explain “solution” in your own words.
6.Explain “electromagnetic radiation” in your own words.
7.Explain “thermal equilibrium” in your own words.
8.Explain “conservation of energy” 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 10
  1. Explain “mixture” in your own words.two or more substances physically combined
  2. Explain “specific heat” in your own words.energy needed to change a material's temperature
  3. Explain “chemical reaction” in your own words.a process that forms new substances
  4. Explain “density” in your own words.mass per unit volume
  5. Explain “solution” in your own words.a uniform mixture in which one substance dissolves in another
  6. Explain “electromagnetic radiation” in your own words.energy carried by electric and magnetic waves
  7. Explain “thermal equilibrium” in your own words.a state in which objects have the same temperature
  8. Explain “conservation of energy” in your own words.energy changes form but is not created or destroyed

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.