PencilGoPencilGo

Forces & Engineering

Grade 2 · Building confidence · 8 questions · Version PG-2BDQN3-1JS4

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

Explain “kinetic energy” in your own words.

2.

Explain “balanced forces” in your own words.

3.

Explain “simple machine” in your own words.

4.

Explain “electric circuit” in your own words.

5.

Explain “gravity” in your own words.

6.

Explain “friction” in your own words.

7.

Explain “unbalanced forces” in your own words.

8.

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

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.