| A | B |
|---|
| Astronomy | _________ is the study of the moon, stars, and other objects in space. |
| Axis | Earth's ____ is the imaginary that passes through Earth's center and the North and South poles. |
| Rotation | ________ is the spinning of Earth on its axis. |
| Revolution | __________ is the movement of one object around another. |
| Orbit | Earth follows a path or _____ as it revolves around the sun. |
| Calendar | A ________ is a system of organizing time that defines the beginning, length, and divisions of a year. |
| Solstice | Each of these days, when the sun is farthest north or south of the equator, is known as a ________. |
| Equinox | This occurs twice a year, when the noon sun is directly overhead at the equator. Each of these days is known as an _______, which means "equal night." |
