How inventions change our lives? lev 3 Unit 13

Cars use...

• axle

• lever

• Wheels

• inclined plane

A simple machine is a ____that makes work easier to do.

• ramp

• tool

• robot

• car

Answer explanation

A simple machine is a tool that makes work easier.

A lever helps push, pull, or ____

things.

• nail

• lift

• carry

• roll

Answer explanation

A lever helps push, pull, or lift

things.

Which is an example of a screw?

• Spiral Staircase

• Multi-Floor Staircase

• Screw Driver

• elevator

Answer explanation

A spiral staircase is an example of a screw.

A bike has got

• wheels and axles

• pulley

• inclined plane

Answer explanation

Wheels and axles

This is an example of_______.

• PULLEY

• LEVER

• RAMP

• WEDGE

Answer explanation

A ramp is an inclined plane.

What is this?

• light

• lamp

• lightbulb

• bulb

It helps us to open the door.

• shovel

• ramp

• doorbell

• doorknob

Answer explanation

A doorknob helps to open the door.

This is an example of a ______.

• PULLEY

• LEVER

• INCLINADED PLANE

• WEDGE

Answer explanation

A seesaw is a lever game.

An axe is an example of a _____.

• Wheel and axle

• Screw

• Ramp

• Wedge

Answer explanation

A wedge helps us split things.