Unit 4 Assessment

Front

What does the law of conservation of charge state?

Back

Charge cannot be created or destroyed.

Front

If an atom has more electrons than protons, what is its charge?

Back

Negatively charged because it has excess electrons.

Front

What happens to an object when it gains electrons?

Back

It becomes negatively charged.

Front

What effect does adding more coils to an electromagnet have?

Back

It becomes stronger.

Front

What is the result of charging by contact?

Back

Both objects have the same charge, so they will repel one another.

Front

Define an atom.

Back

The basic unit of a chemical element, consisting of protons, neutrons, and electrons.

Front

What is an electron?

Back

A negatively charged subatomic particle found in atoms.

Front

What is a proton?

Back

A positively charged subatomic particle found in the nucleus of an atom.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

Front

What is an electromagnet?

Back

A type of magnet in which the magnetic field is produced by an electric current.