The following glossary includes terms that are used in Student Text, Epoch Seven in our Evolving Universe.

Kinetic energy (k&-'ne-tik 'e-n&r-jE)
Kinetic energy is the energy that a body possesses as consequence of its motion.

Plasma ('plaz-m&)
Plasma is sometimes called the fourth state of matter. It is gaseous and contains high-energy electrically-charged particles, like free electrons and positively- and negatively-charged ions.