1. 4 Seasons: 1.1 Notes imgres

2. Astronomy study of the stars, moon, planets and other objects in space

3. Earth’s rotation spinning motion globe, basketball on your finger spinning top

4. Earth’s revolution movement of one object around another orbit 365.4 days for Earth to revolve around the sun one reason we experience seasons causes a year on Earth other examples of revolution:

5. Reason for the Seasons Earth tilted 23.5 degrees as it revolves around the sun Amount of sunlight on different parts of the Earth Direct and indirect light from the Sun

6. Solstice Sol = sun 2 days a year when the sun is directly overhead at noon 23.5 degrees December 21st and June 21st beginning of winter and summer

7. Equinox Equ = Equal Equal Day/Night beginning of spring and fall March 21st and September 21st

8. What does Earth’s rotation cause? Day and Night 24 hours

9. What does Earth’s revolution cause? one year 365.4 days

10. A student who has little knowledge of seasons states that seasons are caused by being close or far from the sun. Is this true? Why or why not? Earth is in a circle around the sun - an ellipse is a flattened circle We are technically closest to the Sun in orbit in January Seasons are caused by the tilt of the Earth, which causes different amounts of sunlight on different parts of the Earth- northern and southern hemisphere Days are longer in the summer and shorter in the winter