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Simple machines make work easier. Examples: Screw, Wheel and Axle, Wedge, Pulley, Inclined Plane,. Lever. Compound Machine: Two or more simple machines ...
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A machine with few or no moving parts. Simple machines make work easier. Examples: Screw, Wheel and Axle, Wedge, Pulley, Inclined Plane, Lever
Two or more simple machines working together to make work easier. Examples: Wheelbarrow, Can Opener, Bicycle
Inclined plane: A sloping surface, such as a ramp. Makes lifting heavy loads easier. The trade-off is that an object must be moved a longer distance than if it was lifted straight up, but less force is needed. Examples: Staircase, Ramp
Lever: A straight rod or board that pivots on a point known as a fulcrum. Pushing down on one end of a lever results in the upward motion of the opposite end of the fulcrum. Examples: Door on Hinges, Seesaw, Hammer, Bottle Opener
Pulley: A wheel that usually has a groove around the outside edge for a rope or belt. Pulling down on the rope can lift an object attached to the rope. Work is made easier because pulling down on the rope is made easier due to gravity. Examples: Flag Pole, Crane, Mini-Blinds Screw: An inclined plane wrapped around a shaft or cylinder. This inclined plane allows the screw to move itself or to move an object or material surrounding it when rotated. Examples: Bolt, Spiral Staircase
Wedge: Two inclined planes joined back to back. Wedges are used to split things. Examples: Axe, Knife
Wheel and Axle: A larger wheel (or wheels) connected to a smaller axle. When the axle is turned, the wheel moves a greater distance than the axle, but less force is needed to move it. Example: Door Knob, Wagon, Toy Car, screwdriver
Name ___________________ SOL 4.2 Simple and Compound Machines NOTE - Simple machines are NOT included in the 5th^ REVISED Science Standards
EXAMPLES – Fill in the examples from the list below
_LEVER____ A stiff bar that rests on a supportcalled a __FULCRUM________^ Lifts or movesloads
shovel seesaw crowbar bottle opener
A slanting surface connecting a lower level to a higher level
Makes lifting easier
stairs slide sloped driveway wheelchair ramp
A wheel with a rod, called an _AXLE_____, through its center: Both parts move together
Lifts or moves loads
skateboard doorknob bike wheel pencil sharpener crank
SCREW An inclined plane wrappedaround a pole^ Holds thingstogether or lifts
corkscrew screw jar lid bolt
PULLEY A grooved wheel with a _ROPEor cable around it^ Moves things up,down, or across
tow truck chain mini-blind cord flag pole rope crane
An object with at least one slanting side ending in a sharp edge
CUTS__ or spreads an object apart
nail pin axe knife
bolt, shovel, nail, mini-blind cord, screw, pencil sharpener crank, flag pole, slide, ax, doorknob, pin, seesaw, crowbar, corkscrew, skateboard, bottle opener, bike wheel, sloped driveway, jar lid, tow truck, stairs, knife, wheelchair ramp, crane
The bike is a compound____________ machine. Name and circle at least four simple machines in this bike. ____lever (brakes)_______ ______wheel and axle_ ______screw_____________ ______pulley (chain) ___
Which is not an inclined plane? a. stairs b. a ramp c. a ladder d. a roof e. *a knife
d. needle e. nail