Electromagnetic waves come from accelerating electric charges, often electrons in atoms. The energy given off travels in a wave that is partly electric and partly magnetic.
Yes, they are.
They are transverse waves.
Frequency determines this.
no
No difference at all. Radio waves are one of many types of electromagnetic waves.
An electromagnet is a type of magnet whose magnetic properties stem from electricity. The earth has a lot of electromagnet waves running through it's surface, which come from the polarization of the planet. A more simple electromagnet can be made by wrapping wire around a metal object and connecting the wire to a battery (just be careful).
Yes.
The source of all sound waves is vibration.
radiation
fair testing
Gamma rays ;)
They are waves that carry energy in the form of a vibraring electric field.