Static Electricity
a material that allows electricity to flow through it easily
A conductor
Why can electric current be dangerous, and list four things you can do to stay safe around electricity.
1. The shock from an electric outlet t or a power line could hurt/kill you.
2. Answer will vary
What are the pros and cons of an incandescent lightbulb?
Pros: cheap to buy
Cons: use a lot of electricity, get hot, only lasts several months
The north pole of a magnet will be a tracked to what pole of another magnet?
South Pole
What part of the magnet has the strongest magnetic force?
The poles
A material that does NOT allow electricity to flow through it easily.
Insulator
What are the two types of circuits?
Describe both
Series: a circuit that has only one path that electricity can flow.
Parallel: a circuit that has two or more paths that electricity can flow.
What is an electromagnet wrapped in?
a coil of wire (usually copper)
To like poles will (attract/repel) each other
repel each other
The space surrounding a magnet in which the magnet's fore is active
Magnetic Field
If you are walking along a carpet wearing clean/dry socks, why might you get shocked if you touch a door handle.
Through friction, the negative charges within your body have transferred into the carpet. You are now positively charged.
When you touch the door handle, the negative charges on the metal handle rush into your body trying to neutralized the charges in your body.
a device that can open and close a circuit
A Switch
What are the pros and cons of a fluorescent lightbulb?
Pros: Don't use a lot of electricity, last several years
Cons: not good for environment, cost more to buy
If I break a bar magnet in half, what happens the the poles of the magnet? Have I destroyed the magnet?
You have not destroyed the magnet. You now have two magnets. You will now have four poles instead of just two poles
The Earth acts as a giant...
Magnet
When you rub a balloon on your head, what causes your hair to stand up and stick to the balloon?
When you rub your head against a balloon, the negative charges move from your body onto the balloon. The balloon is now negatively charged and your head is positively charged .
Objects with opposite charges pull towards each other (attract).
A path that electricity can flow through
circuit
What three metals are magnets attracted to?
iron, steel, cobalt, and nickel
How can you turn a piece of metal into a magnet using another magnet.
What does this do to the atoms within the piece of metal?
You can stroke the piece of metal in one direction along the length of the magnet
This will cause the atoms in the metal piece to align (face one direction).
Describe how a compass works
The point of the magnetic needle within the compass is attracted to the magnetic North Pole of the earth
Define Static Electricity
The buildup of nonflowing electric charge
Define Electric Current
The sustained flow of electricity
What is an electromagnet?
a magnet produced by the flow of electric current
Define magnet:
a metallic object that attracts other objects made of IRON, STEEL, and Cobalt Nickel.
Describe two ways that the earth's magnetic field can help us.
1. We are able to use compasses to keep us from getting lost.
2. It keeps us protected from the sun's cosmic rays