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Science Review

Grade 4 · On-level practice · 10 questions · Version PG-1IQTPFN-102C

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1.State Newton's third-law force pair when swimming.
2.What type of boundary forms when plates move apart?
3.Which blood cells fight infection?
4.What is the difference between weather and climate?
5.What is the role of chlorophyll?
6.What evidence shows a chemical reaction occurred?
7.How do greenhouse gases warm Earth?
8.Why does salt lower water's freezing point?
9.What cell structure contains genetic material?
10.What transfers traits from parents to offspring?

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 15
  1. State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
  2. What type of boundary forms when plates move apart?Divergent boundary
  3. Which blood cells fight infection?White blood cells
  4. What is the difference between weather and climate?Weather is short-term; climate is long-term patterns
  5. What is the role of chlorophyll?Absorb light for photosynthesis
  6. What evidence shows a chemical reaction occurred?New substances form
  7. How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
  8. Why does salt lower water's freezing point?It disrupts ice crystal formation
  9. What cell structure contains genetic material?The nucleus
  10. What transfers traits from parents to offspring?Genes

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.