Atoms
substances that are composed of more than one type of atom bonded together
Compounds
Best known for its rings
Saturn
a measure of the pull of gravity on an object
Weight
first man to set foot on the moon
Neil Armstrong
the length of one complete wave or cycle of oscillation
Wavelength
anything that takes up space and has mass
Matter
speediest planet
Mercury
the tiny particles that all matter is composed of
Atoms
the man who discovered that white light is a combination of many colors
Sir Isaac Newton
an orbit that allows a satellite to remain in the same spot above the earth at all times
Geostationary
the amount of matter in one unit of volume
Density
often called the morning star
Venus
formed by electrons that are in orbit at about the same distance from the nucleus
Shell
first American to orbit the earth
John Glenn
the bending of any wave direction at the boundary between two wave media
Refraction
a substance composed of only one atom is
Element
discovered by the Herschels
Uranus
the amount of matter that makes up an object
Mass
first man to travel in space
Yuri Gagarin
a single rise or depression in a wave
Pulse
a tiny group of two or more atoms that are bonded tightly together
Molecule
Jupiter
the chemical reaction that occurs when a substance reacts rapidly with oxygen
Combustion
man known as the "Father of Modern Rocketry"
Robert Goddard
a back and forth motion that repeatedly follows the same pattern
Oscillation