Step beyond naming machines and start thinking about how they actually help us. Third graders fill in blanks about hammer claws acting as levers, bolt threads spiraling like inclined planes, pizza-cutter wheels, chisel wedges, and crane pulleys. A matching section pairs scissors, slides, doorknobs, and flagpole ropes with the simple machine each one represents.
Working through these problems builds a clear mental link between everyday tools and the science behind them, so you can predict which machine fits a new job.
Style:
Simple Machines
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A hammer claw pulls nails out of wood by working as a lever.
2. The threads on a bolt are shaped like an inclined plane wrapped in a spiral.
3. A pizza cutter uses a wheel and axle to roll across the dough.
4. A chisel is a wedge that carves and splits stone or wood.
5. A crane at a construction site uses a pulley to lift steel beams.
6. Loading a truck by pushing boxes up a ramp uses an inclined plane.
7. When you move the fulcrum closer to the load, the lever needs less force.
8. A wood screw is a type of screw that holds two boards together.
9. Simple machines change the direction or amount of force needed to do work.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Scissors
→ Two levers joined together
Wheel and axle
Slide
→ Inclined plane
Pulley
Doorknob
→ Wheel and axle
Inclined plane
Flagpole rope
→ Pulley
Two levers joined together
Simple Machines
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) A hammer claw pulls nails out of wood by working as a lever.
2) The threads on a bolt are shaped like an inclined plane wrapped in a spiral.
3) A pizza cutter uses a wheel and axle to roll across the dough.
4) A chisel is a wedge that carves and splits stone or wood.
5) A crane at a construction site uses a pulley to lift steel beams.
6) Loading a truck by pushing boxes up a ramp uses an inclined plane.
7) When you move the fulcrum closer to the load, the lever needs less force.
8) A wood screw is a type of screw that holds two boards together.
9) Simple machines change the direction or amount of force needed to do work.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Scissors
→ Two levers joined together
Wheel and axle
Slide
→ Inclined plane
Pulley
Doorknob
→ Wheel and axle
Inclined plane
Flagpole rope
→ Pulley
Two levers joined together
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
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