Grade 3 · Science · Building Confidence
Free Forces & Engineering worksheet - version 10
Grade 3 forces & engineering practice with original, difficulty-matched questions. This printable version includes 8 grade-appropriate questions and a separate answer sheet.
Forces & Engineering
Grade 3 · Building confidence · 8 questions · Version PG-1BOEL7M-1SV0
1.Explain “Newton's third law” in your own words.
2.Explain “prototype” in your own words.
3.Explain “magnet” in your own words.
4.Explain “mechanical advantage” in your own words.
5.Explain “constraint” in your own words.
6.Explain “kinetic energy” in your own words.
7.Explain “electric circuit” in your own words.
8.Explain “balanced forces” in your own words.
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 10
- Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
- Explain “prototype” in your own words.an early model used to test a design
- Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
- Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
- Explain “constraint” in your own words.a limit a design must satisfy
- Explain “kinetic energy” in your own words.energy an object has because of motion
- Explain “electric circuit” in your own words.a complete path through which electric charge can move
- Explain “balanced forces” in your own words.forces with zero net effect on motion
Worked example
Identify forces, constraints, and evidence from a test before revising a design.
Common mistake
Changing several variables at once and losing a fair comparison.
Helpful hint
Change one feature and measure the result.