Edison and the Lightbulb

What part of the lightbulb actually makes the light?

• glass bulb

• base

• filament

• metal casing

What has to flow through the filament to make it hot enough to glow and give off light?

• dirt

• electric current

• water

• air

What are the wires that hold the filament in place?

• support wires

• lightbulb wires

• electric current

• solar energy

The electricity must flow through the lightbulb in a ______________.

• straight line

• moon shaped

• circuit

• triangle

Electric current has ______________ and this produces heat and light.

• color

• sound

• water

• energy

Edison gave up on the lightbulb when it didn't work.

True or False

• True

• False

A carbon coated thread made a good filament for a lightbulb.

True or False?

• True

• False

Edison also discovered that things need ______________ to burn.

• oxygen

• water

• soap

• dirt

4. Bulb glows only in

• A) Open circuit

• B) Closed circuit

• C) In both circuits

• D) Open circuit if bulb is not fused

Today we have _____________ lamps that use gas instead of a filament to give off light.

• solar

• fluorescent

• water

• wind