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Forces & Engineering

Grade 4 · On-level practice · 8 questions · Version PG-1MVGYJQ-1L2J

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1.Explain “iteration” in your own words.
2.Explain “kinetic energy” in your own words.
3.Explain “prototype” in your own words.
4.Explain “efficiency” in your own words.
5.Explain “electromagnet” in your own words.
6.Explain “potential energy” in your own words.
7.Explain “constraint” in your own words.
8.Explain “mechanical advantage” 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 13
  1. Explain “iteration” in your own words.repeatedly testing and improving a design
  2. Explain “kinetic energy” in your own words.energy an object has because of motion
  3. Explain “prototype” in your own words.an early model used to test a design
  4. Explain “efficiency” in your own words.useful output divided by total input
  5. Explain “electromagnet” in your own words.a magnet created by electric current
  6. Explain “potential energy” in your own words.stored energy based on position or condition
  7. Explain “constraint” in your own words.a limit a design must satisfy
  8. Explain “mechanical advantage” in your own words.the factor by which a machine multiplies 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.