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Science Review

Grade 4 · On-level practice · 10 questions · Version PG-VRLQNF-102C

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1.What is the pH of a neutral solution?
2.Which layer of Earth is liquid iron and nickel?
3.What transfers traits from parents to offspring?
4.Which blood cells fight infection?
5.State Newton's third-law force pair when swimming.
6.Why does salt lower water's freezing point?
7.What does conservation of energy mean?
8.What is the role of chlorophyll?
9.How do greenhouse gases warm Earth?
10.What cell structure contains genetic material?

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 4
  1. What is the pH of a neutral solution?7
  2. Which layer of Earth is liquid iron and nickel?Outer core
  3. What transfers traits from parents to offspring?Genes
  4. Which blood cells fight infection?White blood cells
  5. State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
  6. Why does salt lower water's freezing point?It disrupts ice crystal formation
  7. What does conservation of energy mean?Energy changes form but is not created or destroyed
  8. What is the role of chlorophyll?Absorb light for photosynthesis
  9. How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
  10. What cell structure contains genetic material?The nucleus

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.