Electricity Unit Review

Front

Which part of an atom has a negative (-) charge and can move freely?

Back

Electrons

Front

Which part of an atom has a positive (+) charge and cannot move?

Back

Protons

Front

If an atom gains an electron is it positively or negatively charged?

Back

Negatively Charged

Front

What are the three parts to the Law of Electric Charges?

Back

1. 1. Like charges always repel each other.

2. 2. Opposite charges attract each other.

3. 3. Charged objects always attract neutral (uncharged) objects.

Front

Combing your hair is an example of charging by which of the following?

Friction

Induction

Contact

Back

Friction

Front

In which type of charging can electrons move without touching?

Friction

Contact

Induction

Back

Induction

Front

• Electrons cannot freely move between atoms.

• We use these materials to protect us from shocks (ex. The rubber layer covering wires).

• Examples:

  • Wood

  • Paper

  • Rubber

Back

Insulators

Front

• Electrons can move freely between atoms.

• We use these materials to deliver electricity throughout our homes (ex. Copper wire)

• Examples:

  • Copper

  • Iron

  • Silver

Back

Conductors

Front

True or False: Static charges are typically harmless.

Back

True

Front

What is the term for "flow of electrons"?

Back

Current