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Earth - Moon - Sun
Term | Definition |
---|---|
the gravitationally curved path of an object around a point in space. | orbit |
an attractive force between masses | gravity |
motion in a given direction | velocity |
when an object spins around a fixed point called an axis | rotation |
the time it takes an object to travel once in a one complete orbit | revolution |
an increasing area of the moon is illuminated | waxing |
a decreasing area of the moon is illuminated | waning |
is the partial or total blocking of light of one celestial object by another | eclipse |
daily changes in the level of ocean water | tides |
tides that occur during the new moon and full moon | spring tide |
tides that occur during the first and third quarters of the Moon | neap tide |
eclipse that occurs when the Earth passes between the Moon and the Sun, and the Earth's shadow obscures the moon or a portion of it | lunar eclipse |
eclipse that occurs when the Moon passes between the Earth and the Sun, blocking all or a portion of the Sun | solar eclipse |
an imaginary line about which a body rotates | axis |
the Earth's only natural satellite | the Moon |
the star nearest to the Earth | the Sun |
method of heat transfer that does not rely upon any contact between the heat source and the heated object | radiation |
moon phase when 50% of the moon is illuminated from an Earth view point | quarter moon |
moon phase when less than 50% of the moon is illuminated from an Earth view point | crescent moon |
moon phase when more than 50% of the moon is illuminated from an Earth view point | gibbous moon |
moon phase when 0% of the moon is illuminated from an Earth view point | new moon |
moon phase when 100% of the moon is illuminated from an Earth view point | full moon |
the tilt of the Earth's axis (23.5 degrees) causes these | seasons |