Planetary Science

2. Daylight hours are longer and solar angle is much higher.
6. Day of the year when daylight and nighttime hours are exactly equal.
7. Imaginary lines that run horizontally (left and right) around Earth.
8. The system of gases surrounding Earth.
10. Daylight hours are shorter and solar angle is much lower.
12. An imaginary axle going through the North and South Pole; is tilted 23.5 degrees.
13. How far something is above the ground.

1. Path of one object around another; such as the path of Earth around the Sun.
2. Day of the year when the North Pols is leaning either completely toward or completely away from the Sun, creating either the longest or shortest day of the year.
3. A star and all of the planets, moons, and other objects that orbit that star (2 words).
4. It takes Earth 24 hours (1 day) to make one complete ______.
5. The angle that sunlight shines on a surface (2 words).
9. The system of water (solid, liquid, and gas) that is found on, below, or above Earth's surface.
11. Found at 0 degrees latitude.