| A | B |
|---|
| solar system | the Earth, 7 other planets, and thousands of smaller bodies that all revolve around the sun |
| orbit | path that a body in the solar system travels around the sun |
| atmosphere | the layer of oxygen & gases that surround the Earth |
| axis | imaginary line that passes through the earth's center between the North and South Poles |
| revolution | one complete circuit around the sun |
| leap year | year that has an extra day; occurs every fourth year |
| summer solstice | day with the most hours of sunlight and the fewest hours of darkness |
| winter solstice | day with the fewest hours of sunlight |
| equinox | day when a day and night are of equal length in both hemispheres |
| rotate | spin; go around an axis |
| Tropics | the lower latitude areas near the Equator between the Tropic of Cancer and the Tropic of Capricorn |
| significant | important |
| reverse | opposite |
| identical | exactly alike |
