Grade 3 · Science · Challenge
Free Science Review worksheet - version 20
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-1DJX4HC-1LFG
1.What type of boundary forms when plates move apart?
2.What transfers traits from parents to offspring?
3.What is the difference between weather and climate?
4.Why are food webs more realistic than single food chains?
5.What is the pH of a neutral solution?
6.Why do seasons occur?
7.Why does salt lower water's freezing point?
8.Which blood cells fight infection?
9.What evidence shows a chemical reaction occurred?
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 20
- What type of boundary forms when plates move apart?Divergent boundary
- What transfers traits from parents to offspring?Genes
- What is the difference between weather and climate?Weather is short-term; climate is long-term patterns
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- What is the pH of a neutral solution?7
- Why do seasons occur?Earth's tilt as it orbits the Sun
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- Which blood cells fight infection?White blood cells
- What evidence shows a chemical reaction occurred?New substances form
- 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.