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Science/ Harbison
Study notes for daylights test.
| Question | Answer |
|---|---|
| How does the earth move? | 2 major ways, rotation and revolution. |
| rotation. | the spinning of earth on its axis. it causes day and night. 24 hours equals one day |
| revolution | movement of earth around the sun. one complete revolution equals 1 year/ 365 1/4 |
| orbit | the path earth moves around the sun non circular it is elliptical |
| calendar | a system to organize time |
| leap year | an adjustment made by the romans to the egyptian calender made to 365 1/4 days feb. 29th |
| what causes the seasons? | the tilted axis as the earth revolves around the sun |
| summer | north end of earths axis tilted towards the sun. june 21 solctice longest day of the year. |
| winter | south end of earths axis tilted toward the sun december 21 solctice shortest day of the year |
| spring and autumn | neither end of earths axis is tilted toward the sun noon sun directly over head 12 hours day and night |
| vernal/spring equinox | march 21 first day of spring |
| autumnal/fall equinox | september 21 first day of fall |
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