What causes a build up of static?

What happens when certain insulating materials are rubbed together?

Why may a balloon be attracted towards an object with static charge?

Which charge doesn't move as a result of static electricity?

What is a positive static charge caused by?

What happens to the material that looses some electrons?

What happens when two electrically charged objects are brought close together?

How do forces of attraction get weaker?

What can charges move easily through?

Why does some static electricity end up with a spark or shock?

What is static electricity about?