Grade 3 · Science · Challenge
Free Forces & Engineering worksheet - version 4
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 · Stretch challenge · 8 questions · Version PG-C3H1AZ-SWW2
1.Explain “Newton's third law” in your own words.
2.Explain “efficiency” in your own words.
3.Explain “prototype” in your own words.
4.Explain “momentum” in your own words.
5.Explain “iteration” in your own words.
6.Explain “potential energy” in your own words.
7.Explain “constraint” in your own words.
8.Explain “electromagnet” 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 4
- Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
- Explain “efficiency” in your own words.useful output divided by total input
- Explain “prototype” in your own words.an early model used to test a design
- Explain “momentum” in your own words.mass multiplied by velocity
- Explain “iteration” in your own words.repeatedly testing and improving a design
- Explain “potential energy” in your own words.stored energy based on position or condition
- Explain “constraint” in your own words.a limit a design must satisfy
- Explain “electromagnet” in your own words.a magnet created by electric current
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.