Grade 3 · Science · Challenge
Free Science Review worksheet - version 1
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-1W89VDL-1LFG
1.State Newton's third-law force pair when swimming.
2.What does conservation of energy mean?
3.How do greenhouse gases warm Earth?
4.What cell structure contains genetic material?
5.What is density?
6.Why are food webs more realistic than single food chains?
7.Why does salt lower water's freezing point?
8.What is the difference between weather and climate?
9.Which layer of Earth is liquid iron and nickel?
10.What transfers traits from parents to offspring?
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
- State Newton's third-law force pair when swimming.Push water back; water pushes swimmer forward
- What does conservation of energy mean?Energy changes form but is not created or destroyed
- How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
- What cell structure contains genetic material?The nucleus
- What is density?Mass per unit volume
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- What is the difference between weather and climate?Weather is short-term; climate is long-term patterns
- Which layer of Earth is liquid iron and nickel?Outer core
- What transfers traits from parents to offspring?Genes
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.