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Science Review

Grade 5 · Stretch challenge · 10 questions · Version PG-ZMUN2T-178N

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1.What is the pH of a neutral solution?
2.State Newton's third-law force pair when swimming.
3.What type of boundary forms when plates move apart?
4.What does conservation of energy mean?
5.What transfers traits from parents to offspring?
6.Why does salt lower water's freezing point?
7.Which layer of Earth is liquid iron and nickel?
8.Why do seasons occur?
9.Which blood cells fight infection?
10.What evidence shows a chemical reaction occurred?

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. What is the pH of a neutral solution?7
  2. State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
  3. What type of boundary forms when plates move apart?Divergent boundary
  4. What does conservation of energy mean?Energy changes form but is not created or destroyed
  5. What transfers traits from parents to offspring?Genes
  6. Why does salt lower water's freezing point?It disrupts ice crystal formation
  7. Which layer of Earth is liquid iron and nickel?Outer core
  8. Why do seasons occur?Earth's tilt as it orbits the Sun
  9. Which blood cells fight infection?White blood cells
  10. What evidence shows a chemical reaction occurred?New substances form

Worked example

Connect the question to an observable process or scientific model.

Common mistake

Selecting a familiar term without checking its meaning.

Helpful hint

Explain why your answer makes sense.