3.PS3.2 Science Review

Karen turns on a lamp. What does electrical energy convert to when the lamp is turned on?

• motion

• sound

• light

• heat

Students build a simple electrical circuit. They attach a battery, switch, and lamp to some wires. They close the switch as shown. The lamp lights up. What most likely happens when the switch is open?

• The lamp stays lit.

• The lamp becomes brighter.

• The lamp turns off.

• The lamp becomes dim.

Which is NOT an example of electricity converting into another form of energy?

• radio

• toaster

• windmill

• light bulb

Students use a hand-held generator to produce light energy. The light only lights up when the handle is turned. What can the students do to change the amount of energy that enters the bulb?

• Cover the light bulb.

• Turn the handle at different speeds.

• Change the handle to a smaller one.

• Use a different bulb.

Jonathan plugs in a radio and turns it on. What change in energy takes place when he does this?

• Light energy changes into sound energy.

• Electrical energy changes into sound energy.

• Sound energy changes into electrical energy.

• Heat energy changes into sound energy.

Roberto makes an electric circuit that has a switch as one of its parts. What would happen if Roberto moved the switch from closed to open?

• The light bulb would be dimmer.

• The light bulb would be brighter.

• The light bulb would stop shining.

• The light bulb would start shining.

Which home appliance is made to convert electrical energy into sound energy?

• A computer printer

• A refrigerator

• An electric fan

• A radio

Which parts of the circuit below will turn on when the switch is closed?

• buzzer only

• electric motor only

• buzzer and electric motor

• buzzer, electric motor, and light bulb