Pulleys and Gears - Grade 4 Oakridge

What does a pulley do?

• Makes it easier to move things.

• Makes lifting a load easier

• Moves in the opposite direction to the ones touching it.

• Increases speed.

What do you call it when 2 or more gears work together?

• driver gear

• driven gear

• spur gear

• gear train

What is a driver gear?

• The most common type of gear, a wheel with teeth.

• The last gear. It follows the other gears in the system.

• The first gear. It travels in a clockwise direction and drives the other gears in the system.

• All of the above

A bevel gear

• has teeth that go straight up and down when the gear lies flat.

• has a sloped rim and the gears teeth are also sloped.

• looks like a screw and can be linked to a spur gear

• has teeth that are shaped like a V.

A spur gear

• has a sloped rim and the gears teeth are also sloped

• looks like a screw and can be linked to a spur gear

• has teeth that go straight up and down where the gear lies flat

• has teeth that are shaped like a V

A worm gear

• looks like a screw.

• has a sloped rim and its teeth are also sloped.

• has teeth all around the rim.

• has teeth that are shaped like a V

A herringbone gear

• has teeth that are shaped like a V.

• has a sloped rim.

• looks like a screw.

• almost all gear wheels have teeth all around the rim.

Which object does not use a gear system?

• bike

• clock

• elevator

• clothesline

Which object does not use a pulley system?

• clock

• fishing rod

• window blind

• tow truck

What is a gear?

• A wheel with a grove on its edge.

• A wheel with teeth on its edge.

• A wheel which is heart shaped

• All of the above