Electricity and Magnetism

1
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? Test the items
listed below to see if they can make the magnet
move.
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