Science Flashcards
Eclipse
An oval or flattened circle
Full moon
The entire surface of the moon is illuminated
Mare
A large dark plain of solidified lava on the moon
half of the moon is illuminated
Quarter moon
Penumbra
A region of lighter shadow that may surround a dark central region
Waning
The gradual decrease in the illuminated surface of the moon
Terrestrial planet
A planet that has a rocky surface
Astronomical unit
Average distance from the sun which is 93,000,00 miles
Gas giant
A large that planet that consists mostly gases in a dense form
Seasons
One pattern of temperature changes and other weather trends over the course of a year
Solar system
The sun and its family of orbiting planets and moons and other objects
Crescent moon
The illuminated surface is less than a quarter illuminated
Revolution
The motion one body around another such as the earths in its orbit around the sun
Waxing
The gradual increase of the illuminated surface of the moon
Eclipse
An event during which one object in space casts a shadow onto another
Meteorite
A small object from outer space that passes through earths atmosphere and reaches the surface
Impact crater
A round pit left behind the surface of a planet after a small object strikes the surface
Universe
Space and all the matter and energy in it
Gravity
The force that objects exert on one other because of their mass
Umbra
The dark central region of a shadow such as the cone of complete shadow cast by an object
Comet
A Body that produces a coma of gas and dust a small icy body that orbits the sun
Tide
The rise and fall of the oceans caused by the gravitational pull of the moon and the sun
Equinox
In a orbit a position and time in which sun shines equally on both hemispheres
