front 1 Rotation | back 1 The spin of a body on its axis. |
front 2 Day | back 2 The time required for Earth to rotate once on its axis. |
front 3 Revolution | back 3 The motion of a body that travels around another body in space; one complete trip along an orbit. |
front 4 Year | back 4 The time required for Earth to orbit around the sun. |
front 5 Season | back 5 A division of the year that is characterized by recurring weather conditions and determined by both Earth's tilt relative to the sun and Earth's position in its orbit around the sun. |
front 6 Equinox | back 6 The movement when the sun appears to cross the celestial equator. |
front 7 Solstice | back 7 The point at which the sun is as far north or as far south of the equator as possible. |