It's Element-ary
What is anything that takes up space and has mass?
Matter
The first man to set foot on the moon
Neil Armstrong
A single rise or depression in a wave
Pulse
What is the brightest star in the night sky?
Sirius
What is the speediest planet?
Mercury
A tiny group of two or more atoms bonded tightly together
Molecule
The man known as the "father of modern rocketry"
Robert Goddard
A back and forth motion that repeatedly follows the same path
Oscillation
A star system containing millions to billions of stars
Galaxy
What planet was discovered by the Herschels?
Uranus
The amount of matter in one unit of volume
Density
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
Core
What planet is often called the morning star?
Venus
A substance composed of only one type of atom
Element
The first American to orbit the earth
John Glenn
The bending of any wave direction at the boundary between two wave media
Refraction
Large clouds of dust and gas floating in space
Nebulae
Which planet has the moon Ganymede?
Jupiter
Substances composed of more than one type of atom bonded together
Compounds
The first man to travel in space
Yuri Gagarin
The length of one complete wave or cycle of oscillation
Wavelength
What is found in the constellation Ursa Minor and also called the North Star?
Polaris
The planet best known for its rings?
Saturn