Revolution - the movement of Earth in its orbit around the Sun. (It takes 1 year for the Earth to revolve around the sun)., Rotation - the turning of an object on its axis. (It takes 24 hours/1 day for the Earth to do one full rotation)., Solar Noon - the time of day when the Sun is at its highest position in the sky., Sun Angle - the angle between the Sun’s rays and Earth’s surface., Sunset - the time in the evening when the sun disappears or daylight fades., Sunrise - the time in the morning when the sun appears or full daylight arrives., Sundial - an instrument showing the time by the shadow of a pointer cast by the sun on to a plate marked with the hours of the day., Axis - an imaginary line about which a body rotates., Illuminate - to light up, Orbit - the curved path of a celestial object or spacecraft around a star, planet, or moon., Gravity - the force that attracts a body toward the center of Earth, or toward any other physical body having mass, Apparent Brightness - a measure of the luminosity of a celestial object. How bright an object looks in the sky.,

Unit 1: Shadows Vocabulary

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