Grade 3 · Science · Challenge
Free Science Review worksheet - version 5
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-1XC8A5H-1LFG
1.Which blood cells fight infection?
2.What is the difference between weather and climate?
3.Which layer of Earth is liquid iron and nickel?
4.What is density?
5.What transfers traits from parents to offspring?
6.Why does salt lower water's freezing point?
7.What is the role of chlorophyll?
8.Why are food webs more realistic than single food chains?
9.What cell structure contains genetic material?
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 5
- 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
- Which layer of Earth is liquid iron and nickel?Outer core
- What is density?Mass per unit volume
- What transfers traits from parents to offspring?Genes
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- What is the role of chlorophyll?Absorb light for photosynthesis
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- What cell structure contains genetic material?The nucleus
- 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.