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Forces & Engineering

Grade 4 · Building confidence · 8 questions · Version PG-1KGQ8JG-1BAP

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

Explain “mechanical advantage” in your own words.

2.

Explain “unbalanced forces” in your own words.

3.

Explain “magnet” in your own words.

4.

Explain “balanced forces” in your own words.

5.

Explain “constraint” in your own words.

6.

Explain “kinetic energy” in your own words.

7.

Explain “potential energy” in your own words.

8.

Explain “electric circuit” 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 “mechanical advantage” in your own words.the factor by which a machine multiplies force
  2. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  3. Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
  4. Explain “balanced forces” in your own words.forces with zero net effect on motion
  5. Explain “constraint” in your own words.a limit a design must satisfy
  6. Explain “kinetic energy” in your own words.energy an object has because of motion
  7. Explain “potential energy” in your own words.stored energy based on position or condition
  8. Explain “electric circuit” in your own words.a complete path through which electric charge can move

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.