INTRODUCTION TO: EARTH IN SPACE Year 1 Science VIDEO •Introduction to Astronomy LESSON EQ • At the top of page 3 in your INB, rewrite the lesson EQ. EQ: Why do we experience different seasons? CLASS OPENER • 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