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Seasons, Rotation, and Revolution Vocabulary

Rotation To spin on an axis (causes day and night on Earth)
Axis An imaginary line that runs through the Earth from pole to pole It is the center of Earth's rotation
Tilt The slant of Earth's axis, which is 23.5 degrees from vertical The North Pole always faces the North Star
Revolution To move in an elliptical path around a center object
Southern Hemisphere The bottom half of Earth
Direct Sunlight The shortest possible way without intermediates
Indirect Sunlight Any way other than the shortest way There may be objects in the way
Summer When that hemisphere (either the northern or southern) is getting a high amount of direct sunlight
Winter When that hemisphere (either the northern or southern) is getting a low amount of direct sunlight
Equator The half way point on the Earth, it is the place on Earth that always has direct sunlight
Sun It is the medium size star at the center of our solar system, it is the Earth's main light source
Northern Hemisphere The top half of the Earth
Created by: s598336