Machines and Mechanisms - Grade 4

What is a gear?

• A gear is a wheel with a grove on its edge.

• A gear is a wheel with teeth on its edge.

• A gear is a wheel which is heart shaped

• All of the above

A can opener is an example of a 

• pulley
• gear

Window blinds are an example of a...

• pulley
• gear

This is a picture of a...

• fixed pulley

• moveable pulley

A clock has many...

• pulleys
• gears

An elevator involves:

• gears

• pulleys

• both gears and pulleys

When there is 2 or more gears working together it is called a...

• gear machine

• gear trolley

• gear system

• gear train

What type of gear is this?

• Spur Gear

• Bevel Gear

• Worm Gear

• Gear Train

What direction is the output gear going (green gear)

• Clockwise

• Counterclockwise

What direction is the input gear going (red gear)

• Clockwise

• Counterclockwise