Introduction to: Earth in Space Year 1 Science

Introduction to Astronomy Video Introduction to Astronomy

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?

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?

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

Earth’s axis

Day + night

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.

Earth’s Orbit

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

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.

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

Solstices vs. equinox Season Comparisons

Nasa: seasons Seasons: Interactive

Video: Brainpop Seasons