Simple Machines - Worksheet 3
Grade 3•Science•Simple Machines
Aligned to: 3-PS2-2
Answer the following questions about simple machines.
1.
A student wants to lift a heavy book using the least amount of force. Which simple machine would help the most?
A.A wedge
B.A screw
C.A pulley
D.An inclined plane used as a slide
2.
Why is it easier to push a heavy box up a long, gentle ramp than to lift it straight up?
A.The box weighs less on the ramp
B.The ramp spreads the force over a longer distance, requiring less effort
C.Gravity does not work on ramps
D.The ramp makes the box lighter
3.
A ramp is an example of which simple machine?
A.Lever
B.Pulley
C.Inclined plane
D.Wheel and axle
4.
How many types of simple machines are there?
A.3
B.4
C.6
D.10
5.
A seesaw is an example of which simple machine?
A.Wedge
B.Lever
C.Screw
D.Pulley
6.
What do simple machines do?
A.Use electricity
B.Make work easier
C.Create energy
D.Power computers
7.
Simple machines need electricity to work.
8.
A knife is an example of a wedge.
9.
Match each item.
1.Inclined plane
2.Pulley
3.Wedge
4.Wheel and axle
5.Lever
A.Two inclined planes joined (like an axe)
B.A bar that pivots on a fulcrum
C.A wheel with a rope to lift things
D.A flat surface at an angle (ramp)
E.A wheel attached to a rod