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Earth, Sun, Moon

QuestionAnswer
Rotation Spinning of earth on its axis
Revolution Movement of the earth around the sun
Axis An imaginary line that goes through the poles
Equator An imaginary line that runs across the middle of the earth
Tilt the slant of the earth on its axis
Hemisphere an imaginary line that divides the earth into halves
lunar cycle appearance of phases of the moon as viewed from earth
waxing when the moon is getting bigger starting from the right side
crescent moon the phase right after or before a new moon
solar eclipse when the moon passes between the sun and earth
gibbous moon when more than half of the moon is lighted
full moon when the whole moon is lighted from the earth
first quarter 7 days after the new moon, the moon is half lit
third (last) quarter 7 days before the new moon, the moon is half lit
new moon when the moon isn't visible at night
ocean tide the rise and falls of sea levels because of the moon's gravitational pull
high tide when the tide is higher that the average, happens twice everyday
low tide when the tide is lower that the average, happens twice everyday
spring tide when the tide is at its highest point, happens twice a month
neap tide when the tide is at its lowest point, happens twice a month
lunar eclipse when the moon passes the earth into its shadow
axial tilt what causes the seasons, it's the angle between the axis and a line perpendicular to the orbit direction
seasons four divisions of the year caused by the tilt of the earth's axis
wave when a body of water curls and breaks on shore
umbra area in which the shadow of the moon on the earth is total, and the area in which a total solar eclipse is experienced
penumbra the area in which the shadow of the moon on earth is partial, and the area in which a partial solar eclipse is experienced
total eclipse it occurs when the moon casts a total shadow called an umbra
partial eclipse it occurs when the moon casts a partial shadow called a penumbra
polaris the star where the north pole always points at
Created by: hannah_kim
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