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Science Review

Grade 5 · Building confidence · 10 questions · Version PG-EWDMNX-1K6R

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

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 9
  1. Which blood cells fight infection?White blood cells
  2. What evidence shows a chemical reaction occurred?New substances form
  3. Why does salt lower water's freezing point?It disrupts ice crystal formation
  4. State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
  5. What type of boundary forms when plates move apart?Divergent boundary
  6. What is the pH of a neutral solution?7
  7. What transfers traits from parents to offspring?Genes
  8. Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
  9. Which layer of Earth is liquid iron and nickel?Outer core
  10. What is density?Mass per unit volume

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.