Bill Nye: Simple Machines

Wheels, ramps, and pulleys are all forms of what type of machines?

• Complex machines

• Simple machines

• Electric machines

• Hydraulic machines

Simple machines can help us change the __________ and direction of forces.

• Magnitude

• Speed

• Color

• Temperature

What is the point around which a lever moves called?

• Axis

• Fulcrum

• Pivot

• Joint

Your forearm is or is not an example of a lever?

• Is

• Is not

• Sometimes

• Never

A spiral staircase functions as a(n) __________.

• Inclined plane

• Lever

• Pulley

• Wedge

Pulleys make things easier or harder because they spread the work.

• Easier

• Harder

• Neither

• Both

Tags

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Cable cars are operated by a lot of levers and __________.

• Pulleys

• Wheels

• Gears

• Cables

On a boat, pulleys are used to raise and lower __________.

• Sails

• Anchors

• Flags

• Lifeboats

Tags

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An inclined plane wrapped around a rod forms this simple machine 

• lever
• pulley
• screw
• wedge 

A door knob would be an example of which type of simple machine?

• Pulley

• Wheel and axle

• Screw

• Inclined plane