Friction and static electricity Crossword

This printable crossword puzzle on the topic of Physics has 10 clues. Answers range from 5 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

When two surfaces are rubbed together there is ____?
Friction between two surfaces can cause ________ to be transferred from one surface to another.
What do all atoms contain?
Nucleus contain 1. Protons and 2.______?
If 2 negative charged objects are brought close together, they will _______ each other.
What can take place when two objects touch each other?
In order to discharge extra electrons safely from an object, we must ____ it.
What can be used to identify the type of charge in a charged object?
Opposite charges _______ each other?
If an object has more electrons than protons, it is __________ charged.