Do Now In your notebook, answer the following question in complete sentences: What causes the seasons?
Why do we have seasons? Seasons
Rotation vs. Revolution Rotation – The Earth spinning on its axis (Causes night and day) – 1 rotation = 1 day (24 Hours) Revolution – The Earth orbiting around the sun – 1 revolution = 1 year (365 Days)
Why do we have seasons? NOT because we are closer or further from the sun Earth tilts on its axis 23.5 degrees and creates our seasons
Location 1 Summer Solstice June 20 th /21 st Longest Daylight Hours of year Sun Directly Overhead at 23.5 N (Tropic of Cancer) North Pole receives 24 hours of sunlight
Alaska – 24 hours of sunlight!
Midnight Baseball
Location 3 Autumnal Equinox September 22 nd /23 rd Equal Daylight Hours and Nighttime Hours Sun Directly Overhead at Equator Easy way to remember: EQUAL, EQUATOR, EQUINOX
Location 5 Winter Solstice December 21 st /22 nd Shortest Daylight Hours Sun Directly Overhead at 23.5 S (Tropic of Capricorn) North Pole receives 24 hours of darkness
Location 7 Vernal Equinox March 20 th / 21 st Equal Daylight Hours and Nighttime Hours Sun Directly Overhead at Equator Easy way to remember: EQUAL, EQUATOR, EQUINOX
Summer Autumn WinterSpring
What do 2,4,6, and 8 represent? 2 – Summer (Daylight Hours Decreasing) 4 – Autumn (Daylight Hours Decreasing) 6 – Winter (Daylight Hours Increasing) 8 – Spring (Daylight Hours Increasing)
Southern Hemisphere Seasons are OPPOSITE in the Southern Hemisphere Q: If I want to go skiing in June, where should I go?? A: Southern Hemisphere!
In your NBs Answer the following: Southern Hemisphere: Solstice / Equinox Date Day light hours Where is the sun overhead South Pole (if anything)
Location 1: Winter Solstice June Short Daylight hours South Pole 24hrs Dark Sun at 23.5 North Location 5: Summer Solstice December Long Daylight hours South Pole 24hrs Light Sun at 23.5 South
Location 3: Vernal Equinox September Equal Daylight hours Sun at Equator Location 7: Autumnal Equinox March Equal Daylight hours Sun at Equator