Magnets and Electric Charges, Magnetic and Electric Fields

In a neutral atom, the number of electrons is equal to the number of _______.

• Neutrons
• Orbits
• Protons
• subatomic particles

If two charges repel each other, the two charges must be

• Positive and neutra
• Positive and negative
• positive and neutral
• negative and negative

An object becomes charged when the atoms in the object gain or lose

• electrons
• protons
• neutrons
• all of the above

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.
• the silk has become negatively charged.
• protons have moved to the rod.
• glass attracts more protons.

Objects that have opposite charges

• are attracted to each other, and the force between the objects pulls them together.
• are attracted to each other, and the force between the objects pushes them apart.
• are repelled by each other, and the force between the objects pulls them together.
• are repelled by each other, and the force between the objects pushes them apart.  

A region around a charged particle that can exert a force on another charged particle is called an

• electric pulse.
• electric charge.
• electric force.
• electric field.

Electrons have a ______ charge.

• Positive

• Negative

• Neutral

When you get shocked by touching a doorknob, that's an example of ___________________.

• current electricity

• static electricity

Static electricity is when_________________

• electrons jump from one thing to another

• magic happens

• electrons flow through a wire

A material that allows energy to flow through easily

• Conductor

• Insulator