Grade 3 · Science · Challenge
Free Science Review worksheet - version 15
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-JVFBD0-1LFG
1.How do greenhouse gases warm Earth?
2.What does conservation of energy mean?
3.Why does salt lower water's freezing point?
4.Which layer of Earth is liquid iron and nickel?
5.What is density?
6.What is the pH of a neutral solution?
7.Why do seasons occur?
8.What transfers traits from parents to offspring?
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 15
- How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
- 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
- Which layer of Earth is liquid iron and nickel?Outer core
- What is density?Mass per unit volume
- What is the pH of a neutral solution?7
- Why do seasons occur?Earth's tilt as it orbits the Sun
- 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
- 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.