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Forces & Engineering

Kindergarten · On-level practice · 8 questions · Version PG-5JS0T0-1Y78

Children investigate a leaf and a frog with a caregiver beside a pond.
1.

Explain “electric circuit” in your own words.

2.

Explain “friction” in your own words.

3.

Explain “magnet” in your own words.

4.

Explain “simple machine” in your own words.

5.

Explain “gravity” in your own words.

6.

Explain “unbalanced forces” in your own words.

7.

Explain “balanced forces” in your own words.

8.

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

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.