Science Unit 5.3 to 5.9 Flashcards
(28 cards)
What is Brass?
It is a mixture of copper and tin.
What is Iron?
It is a mixture of nickel and chromium.
What is the unit of measuring current?
It is amperes or amps for short.
What is the instrument used to measure current?
It is a multimeter.
What does the multimeter have? Remember chapter 5.3
The multimeter has connectors.
What is metal used for?
It is used for the metal pins in a plug.
What are the two main things electrical appliances made of?
They are made of conductors and insulators.
What is electricity?
Electricity is a form of energy. Electricity is caused by the flow of electrons present in an atom.
Name some sources of electricity
Cells
Battery
Plug
What is a series circuit?
It is a circuit in which there is only one path for electricity to flow.
Instead of drawing a circuit that uses a lot of time, what can we do instead?
We can use circuit symbols which takes less time and is understood by all people who know them.
What does removing or adding bulbs to a circuit do?
It causes each of them to glow less brightly or more brightly.
What does removing or adding batteries or cells to a circuit do?
It also causes the bulbs to glow less brightly or more brightly.
What unit is used to measure the strength of electricity?
The unit used is volts or also V for short.
How does the thickness of the wire affect the speed it is traveling?
It will change as more electricity will pass through the thick wire while less will flow in the wire that is thin.
What do you need for a 3v buzzer?
You need a 3v battery or power source.
When and where did the workers find the ancient tomb?
They found it in June 1936 near Baghdad.
What was one of the oldest items they found inside the tomb? (Remember chapter number 5.9)
The oldest item that was found was a clay jar.
Describe the jar briefly
The jar had an iron rod coming out from the center, surrounded by a tube made out of copper. It was known as the Baghdad battery
Who was Luigi Galvani? What did he do?
He was an Italian doctor and at about 1780 he discovered current electricity.
Who was Alessandro Volta?
He was an Italian university professor.
What are the three things needed for a circuit?
They are:
The source
The wires
And an unbroken loop.
What is a switch?
A switch is a device used for making and breaking electric current through the circuit.
What should we check if a circuit is not working?
We should check if the Wires are not broken Wires are connected Switch is open Or if the battery has leaked or is dead.
