Vocab Flashcards
Space and all the matter and energy in it
Universe
A small object from outer space that passes through earths atmosphere and reaches the surface
Meteorite
Half of the moon is illuminated
Quarter moon
The entire surface of the moon is not illuminated
New moon
Average distance from the sun which is 93,000,000 miles
Astronomical unit
The motion of one body around another such as the earth in its orbit around the sun
Revolution
The illuminated surface is less than a quarter illuminated
Crescent moon
A region of lighter shadow that may surround a dark central region
Penumbra
A large dark plain of solidified lava on the moon
Mare
Millions and billions of stars held together in a group by their own gravity
Galaxy
The dark central region of a shadow such as the come of complete shadow cast by an object
Umbra
A body that produces a coma of gas and dust a small icy body that orbits the sun
Comet
An event during which one object in space casts a shadow onto another
Eclipse
More than half but less than fully illuminated
Gibbous moon
The path of an object in space as it moves around another object due to gravity
Orbit
A sun centered theory of the unvinerse
Heliocentric theory
The rise and fall of the pceans caused by the gravitational pull of the moon and sun
Tide
The gradual decrease in the illuminated surface of the he moon
Waning
Earth centered theory of the solar system
Geocentric theory
An oval or flattened circle
Ellipse
One of a pattern of tempature changes and other weather trends over the course of a year
Season
The force that objects exert on one another because of their mass
Gravity
A round pit left behind on the surface of a planet after a smaller object strikes the surface
Impact crater
The sun and its family of orbiting planets and moons other objects
Solar system
A large planet that consists mostly of gases in a dense from
Gas giant
