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Copyright © 2011 InteractiveScienceLessons.com handout.

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Presentation on theme: "Copyright © 2011 InteractiveScienceLessons.com handout."— Presentation transcript:

1 Copyright © 2011 InteractiveScienceLessons.com handout

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

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 ½ collision moon Label degrees

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

5 Copyright © 2011 InteractiveScienceLessons.com 20 cm Flashlight is parallel with table mark red line in north Lean the northern hemisphere towards flashlight

6 Copyright © 2011 InteractiveScienceLessons.com move light to southern

7 Copyright © 2011 InteractiveScienceLessons.com Mark blue line in south

8 Copyright © 2011 InteractiveScienceLessons.com comparison NºNº SºSº- NºNº x 100 = 44% º 33º- 23º x 100 =

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.

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, ,000,000 diagram-add axis/equator

11 Copyright © 2011 InteractiveScienceLessons.com Compare axes

12 Copyright © 2011 InteractiveScienceLessons.com See how earths axis stays tilted the same all the way around the sun? finish-arrows, label

13 Copyright © 2011 InteractiveScienceLessons.com summer winter summer winter 2 summary statements ? ? ? ?

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

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

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

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


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