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Sun-Earth-Moon

TermDefinition
Satellite A body that orbits a planet
Star A giant ball of superheated gas, or plasma
Meteor Small piece of rock or ice
Comet A cold mixture of dust and ice that develops long trail as it approaches the sun.
Constellation A pattern or group of stars that help people imagine represents a figure, animal or object
Geocentric Earth-centered model
Heliocentric Sun-centered model
Ellipse An oval shape of planets’ orbits
Sun Largest object in our solar system
Planet Spherical, orbits the sun, with a larger mass than nearby objects
Axis An imaginary line that passes from the North Pole through the earths center, to the South Pole
Revolution Movement of one object around another.
Orbit Earth’s path
Solstice When the northern or southern hemisphere is at its strongest tilt towards the sun.
Equinox When Night and day are both 12 hours long.
Gravity Attracts all objects toward another.
Law of universal gravitation The law that states every object in the universe attracts every other object.
Weight Measure of the force of gravity on an object
Inertia Tendency of an object to resist a change in motion
Newton’s first law of motion An object will stay at rest and an object in motion will stay in motion with a constant speed and direction, unless acted on by a force
Phase Different shape of the moon you see
Solar eclipse When the moon passes directly between the sun and earth, only during a new moon
Lunar eclipse Occurs during a full moon when earth I’d directly between the moon and sun
Umbra Darkest part of a shadow where light is completely blocked
Penumbra Area of a shadow where light is partially blocked
Tide Daily rise and fall of ocean water
Spring tide Higher high tides during new and full moons
Neap tide Lower high tides during the first and third quarter moons
Created by: user-1979073
 



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