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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 |