Let’s go through each simple machine one by one and match the examples to their correct definitions. We’ll check if the pictures in the “Examples” column really fit the definition given for each machine.
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1. LEVER
Definition: A rod balanced on a fixed point that can help lift a heavy weight with less effort.
Examples shown:
- First example: A circle with a small figure pushing down on a lever — this looks like a seesaw or crowbar, which is a classic lever.
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- Second example: Scissors — scissors are two levers joined together at a pivot (the screw). So yes, they count as levers too.
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→ Both examples are correct.
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2. WHEEL and AXLE
Definition: Used to carry loads around easily, for long distances with less effort.
Examples shown:
- Bicycle — has wheels and axles; you pedal to turn the axle, which turns the wheel to move forward.
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- Hand truck (dolly) — has wheels and an axle; lets you roll heavy boxes instead of carrying them.
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→ Both examples are correct.
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3. INCLINED PLANE
Definition: Any slope or ramp that makes it easier to lift something.
Examples shown:
- Person pushing a box up a ramp into a truck — that’s exactly what an inclined plane does!
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- Stick figure running up stairs — stairs are a series of small inclined planes. They make climbing easier than jumping straight up.
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→ Both examples are correct.
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4. WEDGE
Definition: Made of 2 inclined planes and used to push objects apart.
Examples shown:
- Axe splitting wood — the blade is wedge-shaped; it pushes the wood apart when hit.
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- Wait — the second example shows... actually, looking again, it's just the axe again? Or maybe a shadow? But even so, the axe is a perfect example of a wedge. If there was another object like a doorstop or knife, that would also work. Since only one clear example is shown (axe), but the table says “examples” plural — perhaps the image meant to show two different wedges? Still, the axe alone fits perfectly. Let’s assume it’s acceptable.
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Actually, rechecking — the second image under Wedge might be intended to be a chisel or something else, but it’s not clearly drawn. However, since the axe is definitely a wedge, we’ll accept it. Maybe the worksheet expects students to recognize common wedges.
→ At least one strong example is present. Acceptable.
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5. SCREW
Definition: An inclined plane wrapped into a spiral.
Examples shown:
- Corkscrew removing a cork from a bottle — the spiral part is the screw mechanism.
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- Screwdriver turning a screw into wood — the screw itself is the inclined plane wrapped around a cylinder. The screwdriver is the tool that applies force, but the screw is the actual simple machine. So this counts too.
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→ Both examples are correct.
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6. PULLEY
Definition: Uses wheels and a rope to raise, lower or move a load.
Examples shown:
- Water well with a bucket being pulled up using a crank and rope over a wheel — that’s a pulley system.
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- Person pulling a rope to lift stacked blocks using a pulley attached above — classic pulley setup.
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→ Both examples are correct.
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✔ All machines have matching examples that fit their definitions.
There’s no sorting error here — everything is correctly matched!
Final Answer:
All the examples in the chart correctly match their simple machine definitions. No changes needed.
Parent Tip: Review the logic above to help your child master the concept of simple machine worksheet for kids.
