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Forces & Engineering

Grade 4 · Building confidence · 8 questions · Version PG-1K6QMUH-1BAP

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

Explain “constraint” in your own words.

2.

Explain “magnet” in your own words.

3.

Explain “electric circuit” in your own words.

4.

Explain “prototype” in your own words.

5.

Explain “unbalanced forces” in your own words.

6.

Explain “mechanical advantage” in your own words.

7.

Explain “kinetic energy” in your own words.

8.

Explain “balanced forces” 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 12
  1. Explain “constraint” in your own words.a limit a design must satisfy
  2. Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
  3. Explain “electric circuit” in your own words.a complete path through which electric charge can move
  4. Explain “prototype” in your own words.an early model used to test a design
  5. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  6. Explain “mechanical advantage” in your own words.the factor by which a machine multiplies force
  7. Explain “kinetic energy” in your own words.energy an object has because of motion
  8. Explain “balanced forces” in your own words.forces with zero net effect on 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.