Grade 3 · Science · Challenge
Free Science Review worksheet - version 4
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-1X28OGI-1LFG
1.What type of boundary forms when plates move apart?
2.What does conservation of energy mean?
3.What evidence shows a chemical reaction occurred?
4.What is the pH of a neutral solution?
5.How do greenhouse gases warm Earth?
6.Why are food webs more realistic than single food chains?
7.Which layer of Earth is liquid iron and nickel?
8.What is the role of chlorophyll?
9.Why do seasons occur?
10.Why does salt lower water's freezing point?
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 4
- What type of boundary forms when plates move apart?Divergent boundary
- What does conservation of energy mean?Energy changes form but is not created or destroyed
- What evidence shows a chemical reaction occurred?New substances form
- What is the pH of a neutral solution?7
- 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
- Which layer of Earth is liquid iron and nickel?Outer core
- What is the role of chlorophyll?Absorb light for photosynthesis
- 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
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.