Seasons

1
Seasons
2
Causes?

• Revolution
• Tilt
• Duration
• Angle

3
ANGLE OF INSOLATION
4
Summer Solstice

• JUNE 21
• Sunlight at highest point over the tropic of
  cancer (23.5 N)
• Aphelion

5
WINTER SOLSTICE

• January 21
• Sunlight at highest point over tropic of
  capricorn
• Perihelion

6
EQUINOX

• Vernal/Autumnal

7
Perihelion vs. Aphelion
8
REVOLUTION OF EARTH

9

• http//kids.msfc.nasa.gov/Earth/Seasons/Seasons.ht
  m
• http//www.astro.uiuc.edu/projects/data/Seasons/se
  asons.html