Grade 3 · Science · Challenge
Free Forces & Engineering worksheet - version 20
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-142U2TJ-SWW2
1.Explain “electromagnet” in your own words.
2.Explain “efficiency” in your own words.
3.Explain “momentum” in your own words.
4.Explain “kinetic energy” in your own words.
5.Explain “iteration” in your own words.
6.Explain “mechanical advantage” in your own words.
7.Explain “Newton's third law” in your own words.
8.Explain “potential energy” 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 20
- Explain “electromagnet” in your own words.a magnet created by electric current
- Explain “efficiency” in your own words.useful output divided by total input
- Explain “momentum” in your own words.mass multiplied by velocity
- Explain “kinetic energy” in your own words.energy an object has because of motion
- Explain “iteration” in your own words.repeatedly testing and improving a design
- Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
- Explain “Newton's third law” in your own words.forces occur in equal and opposite pairs
- Explain “potential energy” in your own words.stored energy based on position or condition
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.