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Science Review

Grade 2 · On-level practice · 10 questions · Version PG-1KE6RNM-L6W9

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1.What is water vapor changing to liquid called?
2.What causes day and night?
3.Which organ pumps blood?
4.What causes sound?
5.Which gas do humans breathe in for respiration?
6.Which planet is known for its rings?
7.What is the freezing point of water in Celsius?
8.Name the three main rock types.
9.What type of energy is stored in food?
10.What role does a mushroom often have in an ecosystem?

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 water vapor changing to liquid called?Condensation
  2. What causes day and night?Earth's rotation
  3. Which organ pumps blood?The heart
  4. What causes sound?Vibrations
  5. Which gas do humans breathe in for respiration?Oxygen
  6. Which planet is known for its rings?Saturn
  7. What is the freezing point of water in Celsius?0°C
  8. Name the three main rock types.Igneous, sedimentary, and metamorphic
  9. What type of energy is stored in food?Chemical energy
  10. What role does a mushroom often have in an ecosystem?Decomposer

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.