1. Today’s Agenda…
Bellringer: Identify each as rotation or revolution (this is not multiple choice)
A. Takes 24 hours
B. Spins on Axis
C. Takes 365 ¼ days
D. Causes day and night
Notes on Seasons

2. Seasons

3. Moon Journal
What did the moon look like last night?

4. Review! 
What causes day and night?
Earth’s rotation on its axis

5. Review! How long does it take for the Earth to revolve around the sun?
365 ¼ days

6. Review! What is an orbit? The path the Earth travels around the sun
Oval shaped

7. Today’s Goals!
I can explain why the Earth has seasons.

8. Seasons on Earth
There are four seasons

9. Seasons on Earth Sunlight hits the Earth
At the equator sunlight hits directly
Closer to the poles, sunlight hits at an angle and energy from the sun is spread out
This explains why it is warmer at the equator than at the poles

10. Seasons on Earth
The Earth has seasons because its axis is tilted as it moves around the sun
Tilted away from the sun for half of the year and toward the sun for the other half
When the North is tilted toward the sun they have summer and the South has winter
Seasons have nothing to do with Earth’s distance from the sun

12. Earth in June The North is: The South is: Tilted toward the sun
Has more hours of daylight
Summer
The South is:
Tilted away from the sun
Less hours of daylight
Winter

13. Earth in December The South is: The North is: Tilted toward sun Summer
Tilted away from sun
Winter

14. Solstices in the North Summer Winter
Sun is directly overhead in the North
June 21
Longest amount of daylight of the year
Winter
Sun is directly overhead in the South
December 21
Shortest amount of daylight of the year
For the Southern Hemisphere, the dates are reversed.

15. Earth in March and September
Halfway between solstices
Neither hemisphere is pointed toward or away from the sun
For two days of the year the noon sun is directly overhead at EQUATOR

16. Earth in March and September
These days are known as an equinox
Length of daylight and dark is about the same
March 21 vernal (spring) equinox
Marks the beginning of spring
September 23 autumnal equinox
Marks the beginning of fall

17. Exit Slip! 
What is the difference between a solstice and an equinox?