1. Get out Friday’s vocabulary foldable (yellow sheets)
Nov
Warmup:
What gives us our day and night?
What gives us our year?
Get out Friday’s vocabulary foldable (yellow sheets)

2. Length of Days & Nights The Earth rotates on its axis
A complete rotation takes a little over 24 hours (1 day)
One side of the Earth is always facing the Sun

3. Length of Days & Nights The side of the Earth facing the Sun has day
The side of the earth facing away from the Sun has night

5. As the Earth Rotates…
The side of the Earth in the sunlight spins away and becomes night
The side of the Earth in the dark spins toward the Sun and becomes day

7. Changing Length of Day & Night
The number of hours of daylight received each day depends on the latitude.
The equator receives about 12 hours of daylight all year long

8. Changing Length of Day & Night
The hemisphere that is tilted toward the Sun gets more hours of daylight that the hemisphere tilted away from the Sun
Latitudes closest to the equator have less change in hours of daylight
Latitudes further from the equator have more dramatic changes in hours of daylight

9. What is the Earth’s degree of tilt?

10. Seasons
The Earth is tilted on its axis

11. Seasons
The tilt does not change – it always remains pointed in the same direction

13. Seasons
As the Earth revolves around the Sun, the tilt sometimes points toward the Sun, sometimes away from the Sun, and sometimes neither away nor toward the Sun

15. Turn in parent signature open spiral to next available page Seasons
The hemisphere that is tilted toward the Sun has _summer_
longer days (more hours of sunlight)
wamer weather

16. Seasons The hemisphere that is tilted away from the Sun has winter
Shorter days (less hours of sunlight)
Cooler weather

17. Seasons
When the Earth is positioned so that the tilt is neither towards nor away from the Sun, we have Spring and Fall
Moderate temperatures
Days and nights of similar length

18. Seasons: Summer (Northern Hemisphere)
Position of the Earth is such that the northern hemisphere is tilted toward the Sun
Summer Solstice (1st day of summer)
Sun at highest point (over Tropic of Cancer)
Most hours of sunlight (longest day)
About June 21

20. Seasons: Fall (Northern Hemisphere)
Position of the Earth is such that the northern hemisphere is tilted neither towards nor away from the Sun
Autumnal Equinox (1st day of fall)
About 12 hours of sunlight
About September 22

22. Seasons: Winter (Northern Hemisphere)
Position of the Earth is such that the northern hemisphere is tilted away from the Sun
Winter Solstice (1st day of winter)
Sun at lowest point (over Tropic of Capricorn)
Fewest hours of sunlight (shortest day)
About December 21

24. Seasons: Spring (Northern Hemisphere)
Position of the Earth is such that the northern hemisphere is tilted neither towards nor away from the Sun
Vernal Equinox (1st day of spring)
About 12 hours of sunlight
About March 21

25. Summing Up:
Winter - Earth tilted away from Sun, fewer hours of sunlight, less direct sunlight (insolation)
Spring – Earth neither tilted away nor toward the Sun, equal hours of daylight and night
Summer – Earth tilted toward the Sun, more hours of daylight, more direct sunlight (insolation)
Fall - Spring – Earth neither tilted away nor toward the Sun, equal hours of daylight and night

28. Energy from the Sun (Insolation)

29. Watch this animation: http://www. shsu

30. Works Cited