Vocab
a source of electricity created from stored chemical energy
Battery
the ability to do work
energy
to move energy from one component to another
transfer
What was the source of energy in the system that we made?
D-Cell
What was the new light producing technology that was developed in 1962?
LED
a pathway for the flow of electric current
circuit
a place where energy comes from, such as batteries, fuels, the Sun, and objects in motion
energy source
a metal or other solid substance through which electric current moves
wire
What was the evidence that energy transferred in the system?
Light
What is needed to light a bulb?
A source of energy in the system
The energy needs a complete pathway through all the components to move or transfer energy
In order for the energy to be transferred, each component in the circuit needs to be connected with two different contact points.
contact point
the place on a component where connections are made to allow electricity to flow
visible evidence of energy
light
To get a lightbulb to shine where do you need to connect the wires on the D-Cell
One wire on each end of the cell
Where is the contact point on a lightbulb?
The bottom of the bulb
What is the name of part of the lightbulb that Thomas Edison said burned out to quickly?
Filament
electric current
the flow of electricity through a conductor
lightbulb
a filament held by two stiff wires and surrounded by a clear glass globe
How do you know when energy is being transferred in a lightbulb circuit?
Light is produced
What where the parts of the system we made? name all 3
D-cells connected to a lightbulb with wires
Who discovered that carbon-coated cotton thread made a good filament?
Lewis Latimer
electricity
energy that flows through circuits and can produce heat, light, motion, and sound
system
an organized group of related objects that forms a whole
What are some of the reason why lamp technology has changed? give me at least 2.
Lower cost, last longer, bright bulb.
What is the effect when you touch the wire to the glass part of the bulb? and why?
Nothing, Because it needs to be connected to the contact point of the bulb for the energy to be transferred.
What is the path taken by electricity through an incandescent lightbulb?
From the negative side of the energy source to the metal base of the bulb, through the filament, through the tip of the bulb and back to the positive side of the energy source