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Forces & Engineering

Grade 2 · Building confidence · 8 questions · Version PG-1GG8MM7-1JS4

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

Explain “potential energy” in your own words.

2.

Explain “unbalanced forces” in your own words.

3.

Explain “simple machine” in your own words.

4.

Explain “friction” in your own words.

5.

Explain “kinetic energy” in your own words.

6.

Explain “force” in your own words.

7.

Explain “gravity” 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 16
  1. Explain “potential energy” in your own words.stored energy based on position or condition
  2. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  3. Explain “simple machine” in your own words.a device that changes the size or direction of a force
  4. Explain “friction” in your own words.a force opposing motion between surfaces
  5. Explain “kinetic energy” in your own words.energy an object has because of motion
  6. Explain “force” in your own words.a push or pull that can change motion
  7. Explain “gravity” in your own words.an attractive force between masses
  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.