| A | B |
|---|
| rotation | the movement of the earth spinning on its axis |
| revolution | the movement of the earth in its orbit around the sun |
| rate of rotation | 24 hours=1day /or 15 degrees /hour or 4 degrees /minute |
| rate of revolution | 365.25 days = 1 year |
| seasons | evidence that we (the earth ) are revolving around the sun |
| summer | axis tilted towards the sun,starts on approximately June 21st, sun at noon is directly overhead at the Tropic of Cancer |
| summer solstice | another name for the first day of summer |
| fall | starts on approximately September 23rd,at noon the sun is directly overhead at the Equator |
| autumn equinox | another name for the first day of fall |
| winter | earth's axis is tilted away from the sun, starts on approximately December 21st, at noon sun is directly overhead at the Tropic of Capricorn |
| winter solstice | another name for the first day of winter |
| spring | starts on approximately March 21st, at noon the sun is directly overhead at the Equator |
| spring/vernal equinox | another name for the first day of spring |
| 3 basic reasons for seasons | 1. revolution of the earth around the sun. 2. tilt of the earth's axis. 3. parallelism of earht's axis. |
| parallelism | the axis always points in the same direction as the earth travels around the sun |
| map | shows all or part of earth's surface on a plane or flat surface |
| latitude | measured distance of degrees north or south of the equator |
| equator | 0 degrees latitude, splits earth into northern and southern hemispheres,largest latitude line |
| longitude | measured distance of degrees east or west of the prime meridian |
| meridian | half circles that run in a north /south direction meeting at the north and south poles |
| parallels | imaginary lines that circle the earth from east to west, parallel to the equator |
| prime meridian | 0 degrees longitude |
| north pole | 90 degrees north latitude |
| south pole | 90 degrees south latutude |
| tropic of cancer | 23.5 degrees north latitude |
| tropic of capricorn | 23.5 degrees south latutude |
| international date line | 180 degrees longitude |
| artic circle | 66.5 degrees north latutude |
| antartic circle | 66.5 degrees south latitude |
| map scale | tells how the map compares in size with the surface of the earth, determined by the ratio of the distance on the map to the distance on the earth |
| compass | instrument used to determine direction |
| map symbols | simple drawings used on a map to represent real objects |
| legend/key | found on a map - contains symbols, scale and compass rose |
