1. Introduction to: Earth in Space
Year 1 Science

2. Introduction to Astronomy
Video
Introduction to Astronomy

3. EQ: Why do we experience different seasons?
Lesson EQ
At the top of page 3 in your INB, rewrite the lesson EQ.
EQ: Why do we experience different seasons?

4. Class Opener: Why do we have seasons?
At the top of page 3 in your INB, rewrite and answer the following question:
Class Opener: Why do we have seasons?

5. Day + night Earth’s rotation causes day and night
Earth rotates on a tilted axis at 23.5o
Axis = an imaginary line that runs through the center of the Earth
Earth rotates on its axis once every 24 hours = 1 DAY

6. Earth’s axis

7. Day + night

8. Earth’s Orbit Earth moves around the sun. This is called a revolution.
One revolution is completed every 365 ¼ days = 1 YEAR
The path Earth takes around the sun is called an orbit. Earth’s orbit is shaped like an ellipse.

9. Earth’s Orbit

10. seasons
Earth is split into 2 parts- Northern and Southern Hemispheres

12. seasons Earth is split into 2 parts- Northern and Southern Hemispheres
Earth has seasons because its axis is tilted. The axis always points in the same direction which causes parts of Earth to be pointed toward and away from the sun throughout the year.

13. Summer Solstice- 1st day of summer
Winter Solstice- 1st day of winter
Fall Equinox- 1st day of fall
Spring Equinox- 1st day of spring

16. Solstices vs. equinox
Season Comparisons

17. Nasa: seasons
Seasons: Interactive

18. Video: Brainpop
Seasons