Grade 2 · Science · Challenge
Free Science Review worksheet - version 20
Grade 2 science review matched to the learner's current level. This printable version includes 10 grade-appropriate questions and a separate answer sheet.
Science Review
Grade 2 · Stretch challenge · 10 questions · Version PG-LNLW39-KTCW
1.Why do shadows change during the day?
2.What is the freezing point of water in Celsius?
3.Which planet is known for its rings?
4.Which gas do humans breathe in for respiration?
5.What role does a mushroom often have in an ecosystem?
6.What causes day and night?
7.What is a food chain's first energy source?
8.What causes sound?
9.What is water vapor changing to liquid called?
10.What process lets plants make food using light?
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 20
- Why do shadows change during the day?The Sun's apparent position changes
- What is the freezing point of water in Celsius?0°C
- Which planet is known for its rings?Saturn
- Which gas do humans breathe in for respiration?Oxygen
- What role does a mushroom often have in an ecosystem?Decomposer
- What causes day and night?Earth's rotation
- What is a food chain's first energy source?The Sun
- What causes sound?Vibrations
- What is water vapor changing to liquid called?Condensation
- What process lets plants make food using light?Photosynthesis
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.