Energy and Force Review

Which of these is NOT an example of a bicycle using mechanical energy?

• The pedals, gears, and chain turn the wheels.
• The wheels turn when the bicycle moves.
• The front wheel guides the bicycle when it moves.
• The reflector allows the bicycle to be seen at night.

A bat searches for prey at night. It makes sounds as it flies and used the echoes to find its prey. When the bat flies and listens to echoes to locate prey, it is using -

• thermal and light energy
• sound and thermal energy
• mechanical energy and sound energy
• light and mechanical energy

A class is learning about states of matter. The teacher shows the students how to set up the investigation shown in the diagram. What kinds of energy are needed in this investigation to change the state of matter of the candle?

• light, mechanical, thermal
• electrical and thermal
• mechanical, light, electrical
• thermal and mechanical

Rube Goldberg was an artist who drew cartoons that showed a very complicated way to do a simple task. The picture shows an example. which form of energy is used to turn on the switch?

• light
• thermal
• electric
• mechanical

Water flows through turbines in dams like the one shown. The flowing water makes the turbine spin. What type of energy is used to make the turbines in this type of dam spin?

• light
• thermal
• sound
• mechanical

Three different objects that use the same source of energy are shown. What is the energy source for these objects?

• light
• mechanical
• sound
• electrical

Students built the circuit shown. The lightbulb does not glow. Which statement explains this observation?

• The battery is not charged.
• The lightbulb is not part of the closed circuit pathway.
• The circuit does not have a switch.
• The bell uses most of the energy from the battery.

Many types of fans are used in homes. What form of energy is the spinning blades of the fan?

• mechanical

• mass

• light

• water vapor

A diagram of a system using solar energy is shown below. To recharge the battery without lighting the bulb, which of the following switches should be closed?

• Switch S only
• Switches R and S
• Switches R and T
• Switches R, S, and T

The diagram shows the metal posts that are usually found on a battery. The battery can be connected to a bell and switch to produce sound. Which statement best explains why there are two metal posts on the battery?

• The battery needs only one metal post to connect to the bell but the other metal post is there in case the first post fails to work.
• The battery needs to form a complete closed circuit that starts with one metal post and ends with the other metal post.
• One metal post makes a complete circuit with the switch and the other post is not needed.
• One post makes the bell start to ring and the other post makes the bell ring louder.