Terms in this set (16)
The distance in degrees north or south of the equator
0 degrees latitude. The sun is directly overhead here on March 21st and September 23rd. This location always gets 12 hours of day and 12 hours of night.
Tropic of Cancer
The line of latitude at 23.5° N. The sun is directly overhead here on June 21st
Tropic of Capricorn
The line of latitude at 23.5° S. The sun is directly overhead here on December 21st
The line of latitude at 66.5° N. The sun does not set here on June 21st.
The line of latitude at 66.5° S. The sun does not set here on December 21st.
Incoming Solar Radiation (Sunlight)
Angle of Insolation
The angle at which the Sun's rays hit an area on Earth.
Duration of Insolation
How long the sun is out for.
When the sun is at a high angle in the sky.
When the sun is at a low angle in the sky
Highest point of altitude, directly overhead. (90°)
December 21st, when the sun is at its southernmost point
June 21st, when the sun is at its northernmost point
Vernal (Spring) Equinox
March 21st, when the sun is directly overhead at the equator. Everywhere on earth gets 12 hours of day and 12 hours of night.
Autumnal (Fall) Equinox
September 23rd, when the sun is directly overhead at the equator. Everywhere on earth gets 12 hours of day and 12 hours of night.
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