Grade 4 · Science · Challenge
Free Science Review worksheet - version 16
Grade 4 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 4 · Stretch challenge · 10 questions · Version PG-OXVSQI-DBMY
1.Why does salt lower water's freezing point?
2.Which blood cells fight infection?
3.How do greenhouse gases warm Earth?
4.Why are food webs more realistic than single food chains?
5.What transfers traits from parents to offspring?
6.What cell structure contains genetic material?
7.Why do seasons occur?
8.What does conservation of energy mean?
9.What is density?
10.What is the role of chlorophyll?
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 16
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- Which blood cells fight infection?White blood cells
- How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- What transfers traits from parents to offspring?Genes
- What cell structure contains genetic material?The nucleus
- Why do seasons occur?Earth's tilt as it orbits the Sun
- What does conservation of energy mean?Energy changes form but is not created or destroyed
- What is density?Mass per unit volume
- What is the role of chlorophyll?Absorb light for 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.