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Science Review

Grade 2 · Stretch challenge · 10 questions · Version PG-YF5C1M-KTCW

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1.What is the freezing point of water in Celsius?
2.What structure protects a plant cell but not an animal cell?
3.What type of energy is stored in food?
4.What is water vapor changing to liquid called?
5.What role does a mushroom often have in an ecosystem?
6.Why do shadows change during the day?
7.What causes day and night?
8.Which simple machine is a ramp?
9.Which organ pumps blood?
10.What is a food chain's first energy source?

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 1
  1. What is the freezing point of water in Celsius?0°C
  2. What structure protects a plant cell but not an animal cell?Cell wall
  3. What type of energy is stored in food?Chemical energy
  4. What is water vapor changing to liquid called?Condensation
  5. What role does a mushroom often have in an ecosystem?Decomposer
  6. Why do shadows change during the day?The Sun's apparent position changes
  7. What causes day and night?Earth's rotation
  8. Which simple machine is a ramp?Inclined plane
  9. Which organ pumps blood?The heart
  10. What is a food chain's first energy source?The Sun

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.