1. Electricity and Magnetism
Chapter 7
Electricity and Magnetism

2. Vocabulary electron: a tiny bit of an atom that has a negative charge
proton: a tiny bit of an atom that has a positive charge
conductor: a material through which electric current passes easily
insulator: a material through which electric current does not pass easily
resistance: how well electricity flows through a material
series circuit: a circuit that connects several objects one after the other so that the current flows in a single path
parallel circuit: a circuit that connects several objects in a way that the current for each object has its own path
magnet: an object that pulls iron and steel things to it
magnetism: the force around a magnet
pole: a place on a magnet where the magnetism is strongest
magnetic field: the space around a magnet where magnetism acts
compass: a small magnet that can turn freely
generator: a machine that uses an energy source and a magnet to make electricity
electromagnet: a magnet made when an electric current flows through a wire

3. Electric Charges Electrons have a negative electrical charge.
Protons have a positive electrical charge.
Like charges repel each other (e.g. electron and electron or proton and proton repel each other).
Unlike charges attract each other (e.g. electron and proton attract each other).

4. Conductors and Insulators
A conductor is a material that allows electric current to pass easily through it.
Many metals are good conductors.
Insulators are materials that do not allow electric current to pass easily.
Air, rubber, glass, and plastic are insulators.
Practice

5. Series Circuits In a series circuit, the bulbs are in the same path.
If one bulb goes out, they all go out.

6. Parallel Circuit
In a parallel circuit, each light has its own path for electric current.
If one light bulb goes out, the other will remain lit.

7. Magnetism
A magnet is anything that pulls iron and steel to it.

8. What will make a magnet move
What will make a magnet move? Test the items listed below to see if they can make the magnet move.
Button
Yarn
Nuts & Bolts
Scissors
Marble
Penny
Paper Clip
Pencil No
Yes
Item

9. Magnetic Poles
The ends of a magnet are where the magnetic effect is the strongest. These are called poles. Each magnet has 2 poles – 1 north, 1 south.

10. Magnetic Fields The region where the magnetic forces
act is called the “magnetic field”.

11. Activities The Blobz Guide to Electricity Changing Circuits Quizlet
Magnazone
Quia Review