Grade 4 · Science · On Level
Free Science Review worksheet - version 8
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 · On-level practice · 10 questions · Version PG-UNNBVJ-102C
1.Which blood cells fight infection?
2.Why are food webs more realistic than single food chains?
3.What does conservation of energy mean?
4.Why does salt lower water's freezing point?
5.How do greenhouse gases warm Earth?
6.Why do seasons occur?
7.What evidence shows a chemical reaction occurred?
8.What is the role of chlorophyll?
9.What is the difference between weather and climate?
10.What cell structure contains genetic material?
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 8
- Which blood cells fight infection?White blood cells
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- What does conservation of energy mean?Energy changes form but is not created or destroyed
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
- Why do seasons occur?Earth's tilt as it orbits the Sun
- What evidence shows a chemical reaction occurred?New substances form
- What is the role of chlorophyll?Absorb light for photosynthesis
- What is the difference between weather and climate?Weather is short-term; climate is long-term patterns
- What cell structure contains genetic material?The nucleus
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.