What is a characteristic of a simple machine?

• It has many moving parts.

• It has few or no moving parts.

• It requires a lot of effort to use.

• It makes work harder.

Who identified three simple machines more than 2,000 years ago?

• Galileo

• Newton

• Archimedes

• Einstein

How many types of simple machines are there?

• 4

• 5

• 6

• 7

Which of the following is a type of lever?

• Wedge

• Screw

• Pulley

• Inclined Plane

Which of the following is a type of inclined plane?

• Wheel and axle

• Lever

• Pulley

• Wedge

What is the purpose of simple machines?

• To make things more complex

• To help do work

• To increase energy consumption

• To reduce speed

How do simple machines affect work?

• By changing the force and distance

• By increasing the weight

• By reducing the time

• By changing the color

Which common playground equipment is an example of a first class lever?

• Slide

• Swing

• See-saw

• Merry-go-round

What is an example of a second class lever?

• Scissors

• Wheelbarrow

• See-saw

• Fishing rod

What is an example of a third class lever?

• Scissors

• Seesaw

• Pair of tweezers

• Wheelbarrow