Do NowIn 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
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3
7
5
4
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2
Location 1Summer Solstice
June 20th/21st
Longest Daylight Hours of yearSun Directly Overhead at 23.5 N (Tropic of
Cancer)North Pole receives 24 hours of sunlight
Alaska – 24 hours of sunlight!
Midnight Baseball
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3
7
5
4
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2
Location 3Autumnal Equinox
September 22nd/23rd Equal Daylight Hours and Nighttime HoursSun Directly Overhead at Equator
Easy way to remember: EQUAL, EQUATOR, EQUINOX
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3
7
5
4
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2
Location 5Winter Solstice
December 21st /22nd Shortest Daylight HoursSun Directly Overhead at 23.5 S (Tropic of
Capricorn)North Pole receives 24 hours of darkness
1
3
7
5
4
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2
Location 7Vernal Equinox
March 20th/ 21st
Equal Daylight Hours and Nighttime HoursSun Directly Overhead at Equator
Easy way to remember: EQUAL, EQUATOR, EQUINOX
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3
7
5
4
68
2
1
3
7
5
4
68
2Summer 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)
1
3
7
5
4
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2
Southern HemisphereSeasons are OPPOSITE in the Southern
Hemisphere
Q: If I want to go skiing in June, where should I go??
A: Southern Hemisphere!
In your NB’s Answer the following:Southern Hemisphere:
Solstice / EquinoxDateDay light hoursWhere is the sun overheadSouth Pole (if anything)
Location 1:Winter SolsticeJune Short Daylight hoursSouth Pole 24hrs
DarkSun at 23.5 North
Location 5:Summer SolsticeDecemberLong Daylight hoursSouth Pole 24hrs
LightSun at 23.5 South
Location 3:Vernal EquinoxSeptemberEqual Daylight hoursSun at Equator Location 7:
Autumnal EquinoxMarchEqual Daylight hoursSun at Equator
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