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Forces & Engineering

Grade 2 · Building confidence · 8 questions · Version PG-1GQ88B6-1JS4

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

Explain “kinetic energy” in your own words.

2.

Explain “magnet” in your own words.

3.

Explain “unbalanced forces” in your own words.

4.

Explain “gravity” in your own words.

5.

Explain “friction” in your own words.

6.

Explain “simple machine” in your own words.

7.

Explain “potential 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 15
  1. Explain “kinetic energy” in your own words.energy an object has because of motion
  2. Explain “magnet” in your own words.an object producing a field that attracts or repels certain materials
  3. Explain “unbalanced forces” in your own words.forces producing a nonzero net force
  4. Explain “gravity” in your own words.an attractive force between masses
  5. Explain “friction” in your own words.a force opposing motion between surfaces
  6. Explain “simple machine” in your own words.a device that changes the size or direction of a force
  7. Explain “potential energy” in your own words.stored energy based on position or condition
  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.