1. AIM: Explain the cause and main characteristics of the seasons globally? OBJ: Given notes and activity sheet SWBAT explain the cause and main characteristics of the seasons globally with 70% accuracy DN: Watch Seasons Video https://www.youtube.com/watch?v=F1nL_M1G1Xw HW check ACT: Introduction to Seasons: Cause and Characteristics (notes); Work on eSpark Assignment HW: Complete What Causes the Seasons? Activity Sheet; Pastrami Exam, Dec. 19; Earth Science, January https://www.youtube.com/watch?v=F1nL_M1G1Xw

2. The Seasons Why equator hot and poles cold? Weather: due to the uneven heating of the earth’s surface Direct rays Indirect rays Heat energy spread out cooling effect Heat energy concentrated Heat energy spread out cooling effect

3. The Seasons Seasons: winter, spring, summer, fall (autumn); changes in precipitation and temperature during the year. Cause of the Seasons: tilt of the earth’s axis Earth’s Tilt: 23.5° from vertical 0° tilt: spring, fall only 23.5° tilt: moderate temperatures winter (cold), spring, summer (warm), fall 35°- 45° tilt: extreme temperatures winter (v. cold), spring, summer (v. hot), fall IMPORTANT: north pole axis facing Sun: Summer north pole axis facing away from Sun: Winter Seasons NOT caused by change in Earth’s distance from the Sun Earth farthest from Sun: summer (Northern Hemisphere) Earth closest to Sun: winter (Northern Hemisphere) Seasons http://macmillanmh.com/science/2008/student/na/scienceinmotion/Common/SIM.html?Module=../Grade4/Chapter8- EarthRevolvesAroundTheSun/

4. The Seasons Solstice: shortest or longest day of the year Northern Hemisphere (NYS) Summer Solstice - June 21 N.P. axis faces towards Sun More hours daylight 40°N-45°N: 15 hrs light ________________ opposite ________________ Southern Hemisphere Winter Solstice – June 21 S.P. axis faces away Sun Less hours daylight 40°S-45°S: 9 hrs light

5. The Seasons Summer Solstice June 21 Winter Solstice Dec 21 Warm Cold Towards Sun Away Sun

6. The Seasons Equinox: equal day & night (12 hours); 1 st day spring/fall March 21, Sept 23 – 12 hour day everywhere on earth N.P. axis not facing towards or away from Sun At Equator: 12 hrs daylight 12 hrs darkness year round; Sun 90° directly overhead.

7. The Seasons Summer Solstice June 21 Winter Solstice Dec 21 Warm Cold Towards Sun Away Sun

8. The Seasons Northern Hemisphere (NYS) Winter Solstice – Dec 21 N.P. axis faces away from Sun Less hours daylight 40°N-45°N: 9 hrs light _____________________ opposite ___________________ Southern Hemisphere Summer Solstice – Dec 21 (yes, Christmas!!) S.P. axis faces towards Sun More hours daylight 40°S-45°S: 15 hrs light

9. The Seasons Summer Solstice June 21 Winter Solstice Dec 21 Warm Cold Towards Sun Away Sun

10. The Seasons https://www.youtube.com/watch?v=F1nL_M1G1Xw Winter solstice Summer solstice 23.5°N 23.5°S