atoms
the smallest unit of an element that maintains the chemical properties of that element.

compressed
Pressed together or into less volume or space

disappear
to cease to exist or be known; pass away; end gradually: One by one the symptoms disappeared.

electromagnetic energy
Is a form of energy that is transferred by radiation

electrons
a subatomic particle that has a negative charge

gamma rays
a high-energy proton emitted by a nuleus during fission and radioactive decay

Geothermal energy
the energy produced by heat within the earth

harness
restraint or support

longitudinal waves
a wave in which the particles of the medium vibrate parallel to the direction of wave motion

molecules
a grops of atoms that are held together by chemical forces; a molecule is the smallest unit of matter that can exist by itself and retain all of a substance's chemical properties.

radio waves
are electromagnetic waves occurring on the radio frequency portion of the electromagnetic spectrum.

transverse waves
a wave in which the particles of the medium move perpendicularly to the direction the wave is traveling.

Uranium
is a silvery-gray metallic chemical element. It occurs naturally in low concentrations in soil, rock and water.

visible light
is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye.

x-rays
They are longer than gamma rays but shorter than UV rays