Copyright © 2011 Inter handout

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Copyright 2011 InteractiveScienceLessons.com handout Slide 2 Copyright 2011 InteractiveScienceLessons.com Two factors cause Earths seasons: 1. The _____ of earths axis. It leans _____ Is the result of a massive _____________, perhaps the same one that created the ________ 2. The _________________ of earth around the sun. Average speed: _________ mph It takes earth ____________ days to make the ________________ mile journey But its always in the same place on the same day every year 1.blanks-rotation Slide 3 Copyright 2011 InteractiveScienceLessons.com 1. The _____ of earths axis. It leans _______ Is the result of a massive _____________, perhaps the same one that created the ________ tilt 23 collision moon Label degrees Slide 4 Copyright 2011 InteractiveScienceLessons.com North Pole South Pole set up flashlight 15 N. 30 N. 45 N. 15 S. 30 S. 45 S. equator axis Slide 5 Copyright 2011 InteractiveScienceLessons.com 20 cm Flashlight is parallel with table mark red line in north Lean the northern hemisphere towards flashlight Slide 6 Copyright 2011 InteractiveScienceLessons.com move light to southern 15 38 23 Slide 7 Copyright 2011 InteractiveScienceLessons.com Mark blue line in south Slide 8 Copyright 2011 InteractiveScienceLessons.com comparison NN SS- NN x 100 = 44% 15 48 33 23 33- 23 x 100 = Slide 9 Copyright 2011 InteractiveScienceLessons.com 2.blanks-revolution Same light, same distance, but the tilt causes it to be 44% more concentrated in the northern hemisphere. Slide 10 Copyright 2011 InteractiveScienceLessons.com 2. The _________________ of earth around the sun. Average speed: _________ mph It takes earth ____________ days to make the ________________ mile journey But its always in the same place on the same day every year revolution 66,000 365.26 600,000,000 diagram-add axis/equator Slide 11 Copyright 2011 InteractiveScienceLessons.com Compare axes Slide 12 Copyright 2011 InteractiveScienceLessons.com See how earths axis stays tilted the same all the way around the sun? finish-arrows, label Slide 13 Copyright 2011 InteractiveScienceLessons.com summer winter summer winter 2 summary statements ? ? ? ? Slide 14 Copyright 2011 InteractiveScienceLessons.com Summary The tilt of the axis causes the hemisphere leaning towards the sun to receive more concentrated sunlight As the earth moves around the sun, the hemisphere leaning towards the sun changes consequences Slide 15 Copyright 2011 InteractiveScienceLessons.com Homework- Consequences. What if (stand your earth straight up and move it around your sun) (keep it tilted, but dont revolve around the sun) II. the earth suddenly stopped revolving around the sun? I. the earths axis was not tilted? matching Slide 16 Copyright 2011 InteractiveScienceLessons.com Easter Set clocks ahead one hour Set clocks back one hour Harvest moon Groundhog Day Blue Moon Equinox (1 st day of spring or fall) Summer Solstice (longest day) Winter Solstice (shortest day) An unusual 5th full moon during a quarter of the year The first full moon after the autumnal equinox When the sun is directly over the Tropic of Capricorn The first Sunday following the 1 st full moon on/after vernal equinox The second Sunday in March When the sun is directly over the equator The second Sunday in November Four days before the cross-quarter (mid-point between winter/spring) When the sun is directly over the Tropic of Cancer Slide 17 Come back and visit InteractiveScienceTeacher.com for everything you need for every lesson: Videos- where I show you how to present each lesson PowerPoints Teacher Notes Student Handouts