1 / 17

24.2 Sun and Seasons

24.2 Sun and Seasons . http://highered.mcgraw-hill.com/sites/007299181x/student_view0/chapter2/ seasons_interactive.html. Earth Motions. 1. Earth moves in two major ways: Rotation : spinning of earth on its axis Revolution : earth orbits around the sun . What Causes Seasons ?.

merlin
Télécharger la présentation

24.2 Sun and Seasons

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 24.2 Sun and Seasons http://highered.mcgraw-hill.com/sites/007299181x/student_view0/chapter2/seasons_interactive.html

  2. Earth Motions 1. Earth moves in two major ways: • Rotation: spinning of earth on its axis • Revolution: earth orbits around the sun

  3. What Causes Seasons? • Tilt of the earth as it moves around the sun • Earth is tilted by 23.5 degrees 2. As the earth orbits, different parts of the earth get direct and intense solar radiation

  4. Seasons 3. Opposite in the N and S hemisphere 4. When N tilted to the sun (summer), S tilted away (winter) 5. If the earth was not tilted= no seasons

  5. Seasons and Latitudes 1. Polar: Cold, don’t have 4 seasons • (66.4 N or S to poles) 2. Temperate: 4 seasons (23.5-66.5 N or S) 3. Tropics: Warm all year, no seasons (23.5 N or S) • Get intense rays all year long

  6. Solstice: sun is directly overhead at latitude 23.5 N or S • Equinox: neither hemisphere is tilted toward the sun, and the lengths of daylight and darkness are =

  7. VERNAL EQUINOX : March 21 1st day of spring Days get longer and warmer Sun’s direct & intense rays fall on the EQUATOR (and move north throughout spring) (equal day and night @ equator) SUMMER SOLSTICE: June 21 1ST day of SUMMER Longest day of the year – Shortest night Sun’s direct & intense rays are over 23.5 N (Tropic of Cancer) AUTUMNAL EQUINOX: Sept 23 1st day of Fall Sun’s direct & intense rays fall on the EQUATOR Days get cooler and shorter (equal day and night @ equator) WINTER SOLSTICE: Dec 21 1ST day of Winter Longest night – shortest day Sun’s direct & intense rays are over 23.5 S (Tropic of Capricorn)

More Related