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Matter & Energy

Grade 4 · On-level practice · 8 questions · Version PG-1CD6R7R-XW0G

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1.Explain “conservation of energy” in your own words.
2.Explain “mixture” in your own words.
3.Explain “specific heat” in your own words.
4.Explain “endothermic process” in your own words.
5.Explain “thermal equilibrium” in your own words.
6.Explain “density” in your own words.
7.Explain “electromagnetic radiation” 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 “conservation of energy” in your own words.energy changes form but is not created or destroyed
  2. Explain “mixture” in your own words.two or more substances physically combined
  3. Explain “specific heat” in your own words.energy needed to change a material's temperature
  4. Explain “endothermic process” in your own words.a process that absorbs energy from its surroundings
  5. Explain “thermal equilibrium” in your own words.a state in which objects have the same temperature
  6. Explain “density” in your own words.mass per unit volume
  7. Explain “electromagnetic radiation” in your own words.energy carried by electric and magnetic waves
  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.