sun

1. A condition in which an object (like the Moon) always shows the same face to the object it orbits because its rotation and orbit take the same amount of time.
3. A stage in the Moon’s cycle where different amounts of the Moon’s sunlit side are visible from Earth.
5. The time when one hemisphere is tilted most directly toward or away from the Sun, creating the longest (summer) or shortest (winter) day of the year.
7. – The spinning of Earth (or another object) around its axis, which causes day and night.
9. The process of growth or increase by the gradual accumulation of additional layers or matter, such as the way Earth and the Moon formed.
10. A tide with the least difference between high and low water, occurring when the Sun and Moon are at right angles relative to Earth.
11. An imaginary line running through the North and South Poles of Earth; Earth rotates around this line.

1. The regular rise and fall of sea levels caused mainly by the gravitational pull of the Moon (and to a lesser extent, the Sun).
2. The movement of Earth in an orbit around the Sun, taking about 365.25 days to complete.
4. A tide with the greatest difference between high and low water levels, caused when the Sun and Moon’s gravitational forces align.
6. The time of year when both hemispheres receive equal sunlight and day and night are nearly equal in length.
8. An event in which one celestial object moves into the shadow of another, blocking light.