Answer the following question given this paragraph: 

Gamma rays are electromagnetic waves. Electromagnetic waves are waves of electric and magnetic energy that travel through space at the speed of light. The energy travels in tiny “packets” of energy, called photons. Photons of gamma energy are called gamma particles. Other electromagnetic waves include microwaves, light rays, and X rays. Gamma rays have the greatest amount of energy of all electromagnetic waves. You can learn more about gamma radiation at this URL: http://www. youtube. com/watch?v=okyynBaSOtA.


Q: Electromagnetic waves are comprised of what two types of energy?

 Choices:

- solar and kinetic

- kinetic and electric

- magnetic and gravitational

- electric and magnetic

A:
electric and magnetic
