4th - Science - Ch 2B Review 1

5 Written Questions

1. When a swing is at the highest point, you have _______________ energy.
2. A nail is an example of a ______________.
3. A __________ is a compound machine.
4. The more something weighs, the _________ you will work to move it.
5. If you move something up a heavy ramp, you are using an ________________.

5 Matching Questions

1. friction
2. wedge
3. wheel and axle
4. equilibrium
5. kinetic

1. a When weights or forces are in balance, we call this ___________________.
2. b The brakes on in-line skates work because of ____________.
3. c Handlebars, pedals, and brakes of a bicycle are a simple machine called a ________ and ____________.
4. d When a person starts to move, potential energy changes to __________ energy.
5. e A knife is s simple machine called a _________.

5 Multiple Choice Questions

1. A _______________ uses chemical energy.
   1. harder
   2. battery-powered car
   3. electrical
   4. potential
2. A battery uses ____________ energy.
   1. chemical
   2. mechanical
   3. electrical
   4. potential
3. You are doing work when you_____________.
   1. harder
   2. carry your books to school
   3. battery-powered car
   4. complex machines
4. _____________ hold many parts of a bicycle together.
   1. weighs
   2. work
   3. levers
   4. screws
5. An electric light uses _____________ energy.
   1. electrical
   2. chemical
   3. potential
   4. mechanical

5 True/False Questions

1. kinetic energy → After you kick a soccer ball, it has __________ energy.

   True        False

2. equilibrium → a simple machine that uses a rope and wheel to change the direction of a force.

   True        False

3. the moon has less gravity than Earth → Astronauts weigh less on the moon than on Earth because____________.

   True        False

4. gravity → Your weight is a measure of the force of _____________.

   True        False

5. work → A nail is an example of a ______________.

   True        False