Q1 Rob7 Gear

What is the main purpose of a gear in a machine?

• To store electricity

• To heat up metal parts

• To transfer motion and power

• To hold two parts together

What happens when gears mesh together?

• They move away from each other

• Their teeth fit together and turn each other

• They stop turning

• They bounce back and forth

What can gears change in a machine?

• The shape of the parts

• The color of the machine

• The speed, direction, or force of movement

• The amount of electricity used

What are gears often called?

• Pins

• Belts

• Cogs

• Springs

Which of the following machines use gears?

• Bicycles, clocks, and motors

• Books, chairs, and pencils

• Fans, papers, and boxes

• Televisions, radios, and speakers

What is a gear train?

• A machine that pulls train cars

• A group of two or more gears working together

• A large single gear

• A moving belt system

How do you determine the size of a gear?

• By measuring its weight

• By checking how fast it moves

• By counting the number of teeth

• By looking at its color

What does the term "speed" mean in gears?

• How loud the gears are

• How long a gear can last

• How fast a gear turns

• How wide the gear is

What is the unit used to measure gear speed?

• Miles per hour

• Kilograms

• Revolutions per minute (RPM)

• Degrees Celsius

What does torque refer to in gears?

• The shape of the gear

• The turning force that moves objects

• The sound of the gear

• The weight of the gear