Climate Controls Climate Controls Myers Social 7

Earth-Sun Relationship The earth is 93 million miles from the sun

Earth-Sun Relationship The earth spins on its axis which is tilted at 23.5 degrees But it also orbits the sun - it takes days to complete the orbit

Earth-Sun Relationship The seasons change as a result of the earth’s orbit and distance from the sun Fall September 23 Spring March 21 Winter December 21 Summer June 21

Summer Solstice June 21st -During the summer solstice the Northern hemisphere receives more direct sunlight. -During this time it is WINTER in the southern hemisphere

Winter Solstice December 21 -During the winter solstice the southern hemisphere receives more direct sunlight. -During this time it is SUMMER in the southern hemisphere

Fall Equinox September 23 -During the fall equinox neither hemisphere receives direct sunlight

Spring Equinox March 21 -During the spring equinox neither hemisphere receives direct sunlight

Latitude  Go to page 13  Start at the Arctic Circle  Locate 90 ° W  Record the climate you find at:

_____,90 °W  75 °N  55 °N  46 °N  40 °N  30 °N  20 °N  17 °N

Latitude   It affects temperature by influencing the intensity of the sun   It influences precipitation   Higher temps = higher evaporation = more precipitation

Land Versus Water Land Versus Water  Stay on Page 13  Find southern Iceland (Reykjavik)  Trace with your finger east  What climate is found at Arkhangel’sk, Russia?   Non-Coastal lands have no ocean currents to impact their precipitation or their temperature.

Go to page 36 Go to page 36  Find Oregon  Trace from the Pacific coast at 42 °N to eastern Oregon  How many climates did you pass through  Use the physical map on page 30 to explain the changes in climate

Mountains   Rain clouds moving over mountains lose tend to rain on one side – leaving the other side dry   In addition, higher elevations have lower temperatures

Mountains and Precipitation

No rain on this side

Geographic Position/Winds  On page 36  Find and record the climate of Richmond,VA  Find and record the climate of St Louis, MO  Find and record the climate of San Francisco, CA

Geographic Position/Winds   Although Norfolk and San Francisco are both coastal cities, westerly winds change their climates   Even though some factors may be the same in two places, where a place is located can change a climate

Air Pressure   Pressure helps to create winds   Winds change temperature and precipitation

Intro to Climographs