1. Lithosphere - the outer part of the earth, consisting of the crust and upper mantle, approximately 100km (62 miles)
2. Epoch - a division of geologic time that is a division of a period.
3. Biosphere - the part of the earth and its atmosphere in which living organisms exist or is capable of supporting life.
4. Electromagnetic Radiation - energy transferred by radiation, especially by an electromagnetic wave.
5. Sound - the sensation stimulated in the organs of hearing by such vibrations in the air or other medium.