| Term | Definition |
|---|---|
| latitude | tells us how far north or south of the equator a place is |
| longitude | tells us how far east or west of the prime meridian |
| orbit | to rotate around its axis |
| rotation | the rotation of the earth around its own axis; earth rotates from west towards the east as viewed from space the earth turns counter-clockwise |
| terminator | is the line where the light and dark halves meet it does not move |
| axis | an imaginary line running through the middle of the planet |
| time zone | moving east: +1 moving west: -1 |
| revolution | happens every year |
| winter solstice | December 21/22 first day of winter in N. hemisphere First day of summer in S. hemisphere |
| summer solstice | June 20/21 first day of summer N. hemisphere first day of winter S. hemisphere |
| vernal equinox | March 19/20 first day of spring in N. hemisphere first day of fall S. hemisphere |
| autumnal equinox | September 22/23 first day of fall in N. hemisphere first day of spring in S. hemisphere |
| ellipse | oval shape earths orbit is on an ellipse |
