Science 3rd Nwk๐๐ Flashcards
The sun and its family of orbiting planets,moons and other objects
Solar system
Millions and billions of stars their in a group by there own gravity
Galaxy
Space and all the matter and energy in it
Universe
An object that that orbits a more massive object
Satellite
. A round pit left behind on the surface of a planet or other body in space after a smaller object strikes the surface
Impact crater
An imaginary line about which turning body such as earth rotates
Axis of rotation
The motion o come body around another such as earth in its orbit around the sun the time it takes an object to go around once
Revolution
One part of a pattern of temperature changes and other earthed trends over the purse of a year.Astronomical seasons are defined and cause by the position of earths axis relative to the direction of sunlight
Season
In an orbit a position and time in which th sunlight shines equally ok the northern hemisphere and the Southern Hemisphere a time of year when day,Igbo and darkness are nearly equal for most of earth
Equinox
In an orbit a position which one hemisphere gets maximum are of sunlight while the other hemisphere gets minimum amount
Solstice
A large dark plain of solidified lava on the moon
Mare
An event during which one object I space cast a shadow onto another
Eclipse
The dark central region of a shadow such as the come of complete shadow cast by an object
Umbra
A region of lighter shadow that may surround an umbra
Penumbra
Earths average distance from the sun
Astronomical unit
An oval or flattened surface
Ellipse
Earth or a planet similar earth that has a rocky surface
Terrestrial planet
A large planet that consists of gases Ina dense form
Gas giant
A small solid rocky body that orbits the sun
Asteroid
A body that produces coma of gas and dust
Comet
A brief streak of light produced by a small particle entering earths atmosphere at a high speed
Meteor
A small object from outer space that passes through earths atmosphere and reaches the surface
Meteorite
The earths center
Geocentric
The sun as the center
Heliocentric