4 Seasons: 1.1 Notes imgres

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

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

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

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

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

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

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

What does Earth’s revolution cause? one year days

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