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Forces & Engineering

Grade 2 · Stretch challenge · 8 questions · Version PG-Q0YQW-17XB

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

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.