Sun’s path review.

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Variation of Insolation

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Presentation transcript:

Sun’s path review

Solstices and Equinoxes Summer Solstice = June 21 Sun rises North of East & Sets North of West 15 Hours of Daylight Sun’s rays are direct at the Tropic of Cancer

Winter Solstice = December 21 Sun rises South of East & Sets South of West 9 Hours of Daylight Sun’s rays are direct at the Tropic of Capricorn

Sun’s Path: Equinoxes Fall Equinox = September 22 Sun rises Due East & Sets Due West 12 Hours of Daylight Sun’s rays are direct at the Equator

*Notice they are the SAME except for the dates* Spring Equinox = March 21 Sun rises Due East & Sets Due West 12 Hours of Daylight Sun’s rays are direct at the Equator *Notice they are the SAME except for the dates*

As angle increaseses, Intensity_____

Where the sun rises and sets DATE (APPROXIMATE) LATITUDE OF SUN'S DIRECT RAYS DIRECTION OF SUNRISE AND SUNSET ALTITUDE OF NOON SUN LENGTH OF DAYLIGHT Sept. 23 (Autumnal Equinox) Equator (0°) Rises due East Sets due West 48° 12 hours December 21 (Winter Solstice) Tropic of Capricorn (23.5°S) Rises in South East Sets in South West 24.5° (lowest) 8 hours (shortest day) March 21 (Vernal Equinox) Rises due East Sets due West June 21 (Summer Solstice) Tropic of Cancer (23.5°N) Rises in North East Sets in North West 71.5° (highest) 16 hours ( longest day)

Seasons Due to the tilt of the earth More direct rays in summer. Direct= hotter We are closer to the sun in the winter

Seasons

What Season?

Shadows Point north Get shorter when the sun is higher Longer when sun is lower

Relationships As intensity of insolation inc, temp___ As angle of insolation inc, temp_____ As angle inc, shadow length______ As latitude increases, intensity/angle of insolation____ As the sun goes from A to B to C, what happens to Intensity of insolation?