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Sun Earth Moon

TermDefinition
Satellite A body that orbits a planet
Star A giant ball of superheated gas, or plasma, composed of hydrogen and helium
Planet Spherical ,orbits the Sun ,with a larger mass than nearby objects
Meteor A steak of light produced when a small piece of rock or ice burns
Comet A cold mixture of dust and ice that develops a long trail of light
Constellation A pattern or group of stars that people imagine represents a figure, animal, or object
Geocentric Earth-centered model
Heliocentric Sun-centered model
Ellipse an oval shape of the planets’ orbits
Sun Largest object in our solar system
Axis An imaginary line that passes from the North Pole to the South Pole.
Rotation The spinning of Earth
Revolution The moment of one object around another
Orbit Earth’s path around the sun
Solstice Two days per year when the sun appears highest in the sky
Equinox Night and day are both 12 hours long
Gravity This force attracts all objects toward each other
Law of universal gravitation Pull of gravity depends on mass and distance
Inertia The tendency of an object to resist a change in motion.
Phase Different shape of the moon you see
Solar eclipse When the moon passes directly between the Earth and Sun during a new moon.
Lunar eclipse Occurs during a full moon when the earth is directly between the moon and the sun.
Umbra Darkest part of a shadow where light is completely blocked
Penumbra Area of shadow where light is partially blocked
Tide The rise and fall of ocean water
Spring tide Higher high tides during full and new moons.
Neap tide Lower high tides during the first and third quarter moon.
Maria Dark smooth lava covered areas on the moon.
Weight Force of gravity on an object.
Created by: user-1979319
 

 



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