Grade 3 · Science · Challenge
Free Science Review worksheet - version 11
Grade 3 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 3 · Stretch challenge · 10 questions · Version PG-IRGWL4-1LFG
1.Why do seasons occur?
2.Which layer of Earth is liquid iron and nickel?
3.What cell structure contains genetic material?
4.What type of boundary forms when plates move apart?
5.State Newton's third-law force pair when swimming.
6.Why does salt lower water's freezing point?
7.Why are food webs more realistic than single food chains?
8.Which blood cells fight infection?
9.What is the difference between weather and climate?
10.What does conservation of energy mean?
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 11
- Why do seasons occur?Earth's tilt as it orbits the Sun
- Which layer of Earth is liquid iron and nickel?Outer core
- What cell structure contains genetic material?The nucleus
- What type of boundary forms when plates move apart?Divergent boundary
- State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- Which blood cells fight infection?White blood cells
- What is the difference between weather and climate?Weather is short-term; climate is long-term patterns
- What does conservation of energy mean?Energy changes form but is not created or destroyed
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.