Moon phases, Eclipses, and Tides

Term Definition
New Moon None of the moon is visible.
First Quarter Exactly half of the Earth-facing moon is visible. The visible part of the moon is growing
Full Moon The entire side of the Moon facing the Earth is visible
Third Quarter Exactly half of the Earth-facing moon is visible. The visible part of the moon is shrinking
Waning The visible moon is getting smaller
Waxing The visible moon is getting larger
Gibbous The moon is more than half but less then full
Crescent The moon is less than half way full
Lunar Eclipse The moon passes through the Earth’s shadow. The order is sun, Earth, moon
Solar Eclipse The moon moves between the sun and the Earth. The order is sun, Earth, moon
Corona The outer part of the sun that is only visible during a solar eclipse
Gravity The force of attraction between objects, it keeps objects in orbit
Tides The daily changes in the level of the oceans and other large bodies of water
High Tides They occur on the side of the Earth facing the moon and on the opposite side. The water level is higher in these locations.
Low Tides They occur between the locations of the high tides. The water is pulled away from these locations so the water level is low.
Neap Tide Tides that have the smallest daily tidal range. They happen when the sun, Earth, and moon form a 90 degree angle.
Spring Tide Tides that have the largest daily tidal range. They happen when the sun, Earth, and moon are aligned.
Waning Crescent Less than half of the left side of the moon's circle is lit. The lighted part is growing smaller.
Waxing Crescent Less than half of the right side of the moon's circle is lit. The lighted part is growing larger.
Waxing Gibbous More than half of the right half of the moon's circle is lit, but the moon is still less than full.
Waning Gibbous The moon's left side is less than full but more than a quarter.
Umbra The dark inner shadow of an object where the light is totally blocked
Penumbra The lighter outer shadow where the light is only partially blocked