PencilGoPencilGo

Science Review

Grade 5 · Stretch challenge · 10 questions · Version PG-YIW8AX-178N

1.

What evidence shows a chemical reaction occurred?

2.

How do greenhouse gases warm Earth?

3.

Why do seasons occur?

4.

What type of boundary forms when plates move apart?

5.

Which blood cells fight infection?

6.

Why are food webs more realistic than single food chains?

7.

What is density?

8.

State Newton's third-law force pair when swimming.

9.

What transfers traits from parents to offspring?

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 14
  1. What evidence shows a chemical reaction occurred?New substances form
  2. How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
  3. Why do seasons occur?Earth's tilt as it orbits the Sun
  4. What type of boundary forms when plates move apart?Divergent boundary
  5. Which blood cells fight infection?White blood cells
  6. Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
  7. What is density?Mass per unit volume
  8. State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
  9. What transfers traits from parents to offspring?Genes
  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.