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unit 4 vocab

QuestionAnswer
rotation the spin of a body on its axis
day The time required for Earth to rotate once on its axis
revolution The motion of a body that travels around another body in space: one complete trip along an orbit
year The time required for the Earth to orbit once around the sun
season A division of the year that is characterized by recurring weather conditions, and determined by both Earths tilt relative to the sun s rotation
equinox when the Sun crosses the Earth's equator, making day and night approximately equal in length (12 hours) everywhere on the planet
solstice he sun reaches its maximum or minimum declination, marked by the longest and shortest days
gravity the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
satellite n artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
lunar phases the changing, cyclical shapes of the illuminated portion of the Moon as viewed from Earth over approximately 29.5 days
eclipse an astronomical event occurring when one celestial body moves into the shadow of another or has another body pass between it and the viewer
umbra the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
penumbra the partially shaded outer region of a shadow cast by an opaque object, such as during an eclipse, or a surrounding fringe area
tide he regular, alternating rise and fall of sea levels, typically occurring twice daily due to the gravitational pull of the moon and sun, combined with Earth's rotation
tidal range the vertical difference in height between a high tide and the succeeding low tide
spring tide exceptionally high-range tides that occur during new and full moons, when the Earth, Sun, and Moon align
neap tide A neap tide is a period of moderate, low-range tides occurring twice a month, seven days after a spring tide, when the sun and moon are at right angles (quadrature) to each other
Created by: Sailor Allen
 

 



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