3rd Grade Science - Questions on Simple Machines

A simple machine makes work easier because using it —
(2010 test question)
1. takes less force to move something heavy
2. changes the weight of something heavy
3. improves the way something looks
4. lets something become a different shape
Which of these is an example of a lever?
(2008 test question)
Which of these shows a pulley?
(2007 test question)
A student wants to look under a heavy rock. Which simple machine would be BEST to use to lift the rock?
(2007 test question)
1. Wheel and axle
2. Lever
3. Inclined plane
4. Screw
Which of these simple machines does this model represent?
(2010 test question)
1. A screw
2. A wedge
3. A lever
4. A pulley
The picture shows a jar with its lid. What kind of simple machine is a jar lid?
(2009 test question)
1. Ramp
2. Pulley
3. Screw
4. Wedge
Which machine uses a wheel and axle?
(2009 test question)
Which kind of work is made easier by the wheels of a wagon?
(2009 test question)
1. Pulling a heavy load
2. Lifting a wide load
3. Dividing a large load
4. Holding a small load
Which of these is a compound machine that is a lever and a wedge working together?
(2009 test question)