They always attract each other.

When one body contains positive and the other body negative electricity, what will the two bodies do?

They will rush together.

When both bodies are positive or both are negative, what will they do?

They will repel each other.

When a body permits electricity to pass freely through it, what is it called?

It is called a good conductor of electricity.

What substances are good conductors of electricity?

Metals, charcoal, water, animals, vegetables, flame, and smoke.

When a body does not permit the electricity to pass through it, what is it called?