Grade 3 · Science · Building Confidence
Free Forces & Engineering worksheet - version 19
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-1E6B0GD-1SV0
1.Explain “mechanical advantage” in your own words.
2.Explain “prototype” in your own words.
3.Explain “Newton's third law” in your own words.
4.Explain “balanced forces” in your own words.
5.Explain “magnet” in your own words.
6.Explain “constraint” in your own words.
7.Explain “potential energy” in your own words.
8.Explain “unbalanced 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 19
- Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
- Explain “prototype” in your own words.an early model used to test a design
- Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
- Explain “balanced forces” in your own words.forces with zero net effect on motion
- Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
- Explain “constraint” in your own words.a limit a design must satisfy
- Explain “potential energy” in your own words.stored energy based on position or condition
- Explain “unbalanced forces” in your own words.forces producing a nonzero net force
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.