25 terms

Sun, Earth, and Moon Systems

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Rotation
spinning on an axis
Revolution
an object moving around another object
Axis
imaginary line that passes through the Earth's center from the North to the South
Orbit
Earth's path as it revolves around the sun
Tide
daily changes in the level of ocean water
High Tide
the tide when the water is above average
Low Tide
the tide level when the water is below average
Lunar cycle
the orbit of the Moon around Earth during which all of the lunar phases occur
Seasons
caused by the tilt of the Earth's axis and its revolution around the sun.
Equinox
occurs when the Sun is directly overhead at the equator and results in day and night of equal length for both northern and southern hemispheres.
Crescent
Moon phase in which less than half of the Moon appears to be illuminated.
Waxing
the period during which the visible surface of the moon increases- Light from the right
Waning
the period during which the visible surface of the moon decreases-Left Lit Leaving......
Illuminate
make lighter or brighter
Full Moon
when the entire sunlit side of the moon faces earth
New Moon
when the moon is completely dark because it's unlit side is facing Earth
Lunar Eclipse
occurs when Earth's shadow falls on the Moon
Solar Eclipse
occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth.
Hemisphere
each half of the globe
Gibbous
moon phase in which more than half of the Moon appears to be illuminated on the right side
Third Quarter
Waning Moon phase in which only half of the lighted side of the Moon can be seen, on the left side
First Quarter
Waxing Moon phase in which exactly half of the Moon appears to be illuminated on the right side
Spring tide
A tide with the greatest difference between high and low tide that occurs when the sun and the moon are aligned in a line with Earth
Neap tide
a tide with the least difference between high and low tide that occurs when the sun and moon pull at right angles to each other
Tilt
23.5 degrees, causes seasons

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