Grade 3 · Science · Challenge
Free Science Review worksheet - version 9
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-1YG6OXD-1LFG
1.Why does salt lower water's freezing point?
2.Why are food webs more realistic than single food chains?
3.What type of boundary forms when plates move apart?
4.How do greenhouse gases warm Earth?
5.Which layer of Earth is liquid iron and nickel?
6.What is the pH of a neutral solution?
7.What cell structure contains genetic material?
8.What evidence shows a chemical reaction occurred?
9.What transfers traits from parents to offspring?
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 9
- Why does salt lower water's freezing point?It disrupts ice crystal formation
- Why are food webs more realistic than single food chains?Organisms have multiple food sources and predators
- What type of boundary forms when plates move apart?Divergent boundary
- How do greenhouse gases warm Earth?They absorb and re-emit infrared energy
- Which layer of Earth is liquid iron and nickel?Outer core
- What is the pH of a neutral solution?7
- What cell structure contains genetic material?The nucleus
- What evidence shows a chemical reaction occurred?New substances form
- What transfers traits from parents to offspring?Genes
- 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.