Heat, Work, and Simple Machines

The bottom of a light bulb is a __________. You turn it clockwise into a light socket to screw it in, and counter-clockwise to unscrew it.

• lever

• screw

• gear

• wedge

A broom is a ____________. When using a broom, one hand acts as the fulcrum, and the other pushes the broom across the floor.

• lever

• screw

• pulley

• wedge

A ramp is a/an __________; it allows heavy object to be moved up or down using less effort over a greater distance.

• lever

• wheel-and-axle

• gear

• inclined plane

A/an __________ consists of a flat, slanted surface.

• pulley

• inclined plane

• force

• wheel-and-axle

Identify the simple machine

• lever

• pulley

• wedge

• inclined plane

Identify the simple machine

• wheel-and-axle

• pulley

• wedge

• screw

Examples of ___________ machines are a wheelbarrow, can opener, and bicycle.

• new

• compound

• expensive

• large

A doorknob is an example of a(n)__________

• inclined plane

• fixed pulley

• wheel-and-axle

• compound machine

The lid of a toilet seat is an example of a(n) _________

• lever

• pulley

• wedge

• screw

• lever

• pulley

• wedge

• screw