7.P.2.3

Constance drew a diagram to show the flow of electricity in a flashlight.
What would happen if Constance placed the cardboard circle between the two batteries?

• The flashlight would not work.
• The light would only be half as bright.
• The cardboard would not affect the flashlight.
• The flashlight would stay on if she turned off the switch.

In which situation is no work done?

• A hockey puck slides along ice at constant speed.
• A golfer hits a golf ball with 15,000 N of force.
• An object hits the window of an accelerating car.
• A basketball bounces on the ground.

What form of energy is stored in a battery?

• chemical
• sound
• light
• heat

When a battery is attached to a circuit,

• the electricity stays in the battery.
• all the electricity empties into the circuit.
• the electricity goes around the circuit and back to the battery.
• some of the electricity goes into the circuit, and the rest stays in the battery.

Energy is transferred in an electrical circuit through

• static protons.
• moving protons.
• static electrons.
• moving electrons.

One device used for electrical safety involves a metal strip that bends when it gets hot. This bending flips a switch which interrupts the current. What is this device called?

• circuit breaker
• fuse
• electric meter
• resistor

Which of the following best describes the function of a resistor in an electrical circuit?

• It opens the circuit.
• It creates the electric field.
• It controls the amount of current.
• It provides energy to the circuit.

A student taps the first marble and the sixth marble rolls away.

• conservation of energy
• energy transfer
• convection
• radiation

The primary function of a doorbell circuit is to convert electrical energy into

• sound
• motion
• radiant energy
• chemical energy

When a button is pushed on a battery-operated clock, the time display is illuminated. What process has taken place?

• Pressure has been converted to light.
• Force has been converted to light.
• Closing an electric circuit has produced light.
• Opening an electric circuit has produced light.