Simple Machines Worksheet for students to match and identify examples of simple machines.

Let's solve this Simple Machines Worksheet step by step, explaining each answer clearly.

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Part 1: Matching

We are matching the simple machines (1–7) with their correct definitions (A–G).

#### 1. Lever
- Definition: Turns on a point called a fulcrum
- Correct match: F

> A lever is a rigid bar that pivots around a fixed point called the fulcrum, like a seesaw or crowbar.

#### 2. Inclined Plane
- Definition: Is a ramp
- Correct match: D

> An inclined plane is a flat surface set at an angle to help lift objects, such as a ramp or slide.

#### 3. Wedge
- Definition: Can either hold things together or split things apart
- Correct match: C

> A wedge is a triangular-shaped tool used to split materials (like an axe) or hold things together (like a doorstop).

#### 4. Screw
- Definition: An incline plane wound around a cylinder
- Correct match: A

> A screw is essentially an inclined plane wrapped around a cylinder—like a bolt or jar lid.

#### 5. Pulley
- Definition: Wheels with grooves around the rim
- Correct match: G

> A pulley consists of a wheel with a groove along its edge to guide a rope or cable. It helps change the direction of force or lift loads.

#### 6. Wheel and Axle
- Definition: Two machines in one: helps roll heavy objects more easily, or it can be used to open doors.
- Correct match: E

> The wheel and axle system uses a large wheel attached to a smaller axle. Turning the wheel moves the axle, making it easier to move loads (e.g., doorknob, steering wheel).

#### 7. Gears
- Definition: Measured by the number of teeth it has
- Correct match: B

> Gears are toothed wheels that transfer motion and force between parts. The number of teeth determines how fast or slow the gear turns.

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✔ Part 1 Answers:

1. F
2. D
3. C
4. A
5. G
6. E
7. B

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Part 2: Fill in the Blanks

Now let’s look at each image and determine the simple machine.

#### 1. The surface of a ski slope is an example of a(an) _________.
- Image: A person skiing down a slope.
- This is a ramp — a flat surface at an angle.
- Answer: Inclined plane

> Ski slopes use inclined planes to allow skiers to descend gradually.

#### 2. The part of the oar indicated by the arrow is an example of a(an) _________.
- Image: Oar in water; arrow points to the part where it meets the boat (the handle).
- The oar acts as a lever, with the pivot point (fulcrum) being where the oar rests in the boat.
- The arrow likely points to the fulcrum — the pivot point.
- But wait — the question says "the part of the oar indicated by the arrow" — if the arrow points to the handle, then it’s the effort arm. If it points to the pivot, it's the fulcrum.
- However, since it's asking for the part and not the whole machine, and given typical diagrams, if the arrow points to the pivot, it's a fulcrum — but fulcrum is not a machine.
- But the entire oar is a lever. So if the arrow points to the oar, it’s a lever.
- But the question asks for the part indicated by the arrow.

Let’s assume the arrow points to the end of the oar in the boat — that’s the fulcrum, but again, not a machine.

Wait — perhaps the oar itself is the lever. Since it's a common example of a lever, and the arrow may indicate the entire oar.

But the best interpretation: The oar is a lever, so even if the arrow points to a part, the machine is a lever.

✔ Answer: Lever

> The oar functions as a lever, with the pivot (fulcrum) at the boat's edge, effort applied by the rower, and resistance from the water.

#### 3. A doorknob is an example of a(an) _________.
- Image: A doorknob.
- A doorknob is a wheel and axle — turning the wheel (knob) rotates the axle inside the door.
- ✔ Answer: Wheel and axle

#### 4. A simple machine useful for raising a flag is a(an) _________.
- Image: Flag on a pole, going up.
- Flags are raised using a pulley system at the top of the flagpole.
- ✔ Answer: Pulley

#### 5. The part of the ax indicated by the arrow is a(an) _________.
- Image: Person holding an ax; arrow pointing to the blade.
- The blade of the ax is a wedge — it splits wood by pushing into it.
- ✔ Answer: Wedge

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✔ Part 2 Answers:

1. Inclined plane
2. Lever
3. Wheel and axle
4. Pulley
5. Wedge

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✔ Final Answer Summary:

#### Part 1: Matching
1. F
2. D
3. C
4. A
5. G
6. E
7. B

#### Part 2: Fill in the Blanks
1. Inclined plane
2. Lever
3. Wheel and axle
4. Pulley
5. Wedge

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