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The Earth in Space
| Term | Definition |
|---|---|
| solar system | planets, along with their moons, asteroids and other bodies, and the sun |
| orbit | specific path each planet follows around the sun |
| revolution | one complete circuit around the sun |
| leap year | year with 366 days, which happens every fourth year to make calenders match Earth's movement around the sun |
| rotate | to spin on an axis |
| axis | imaginary line that passes through the center of Earth from the North Pole to the South Pole |
| atmosphere | layer of oxygen and other gases that surrounds Earth |
| summer solstice | day that has the most daylight hours and the fewest hours of darkness |
| winter solstice | day of the year that has the fewest hours of sunlight and the most hours of darkness |
| equinox | either of the days in spring and fall in which the noon sun is overhead at the Equator and day and night are of equal length in both the Northern and Southern Hemispheres |
| Tropics | area between the Tropic of Cancer and the Tropic of Capricorn, which has generally warm temperatures because it receives the direct rays of the sun for much of the year |
| significant | important |
| reverse | opposite |
| identical | exactly the same |
Created by:
akennon
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