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Forces & Engineering

Kindergarten · Building confidence · 8 questions · Version PG-I60WG-1B3W

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1.Explain “simple machine” in your own words.
2.Explain “unbalanced forces” in your own words.
3.Explain “gravity” in your own words.
4.Explain “kinetic energy” in your own words.
5.Explain “electric circuit” in your own words.
6.Explain “friction” in your own words.
7.Explain “force” in your own words.
8.Explain “magnet” 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 15
  1. Explain “simple machine” in your own words.a device that changes the size or direction of a force
  2. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  3. Explain “gravity” in your own words.an attractive force between masses
  4. Explain “kinetic energy” in your own words.energy an object has because of motion
  5. Explain “electric circuit” in your own words.a complete path through which electric charge can move
  6. Explain “friction” in your own words.a force opposing motion between surfaces
  7. Explain “force” in your own words.a push or pull that can change motion
  8. Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials

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.