Aim: The Sun’s Changing Path

Approximately how many hours of sun-light does the North pole receive on March 21? How about 42*South?

Remember! It’s all about the TILT

During which time of year is the Angle of the sun highest in New York? Hawaii? Any place in the Northern Hemisphere?

Why?

During which time of year is the duration of Insolation the Least in New York? Hawaii? Alaska?

What direction are these Solar Panels facing in NYS?

Why?

What Season is this for North Hemisphere?

Can you match the Path to its Season?

NYS

What season is being represented in the diagram?

Look a the Sun at the North Pole throughout the Day. What season is it?

Facing SOUTH in Upstate New York: March 21

Which position correctly shows the Northern Hemisphere during summer?

Sun’s Apparent Path for NYS: Dec. 21-Winter: Path ___ Rises ____ Sets___ Mar. 21-Equinox: Path___ Rises ____ Sets___ June 21- Summer: Path___ Rises ____ Sets___ Sept. 23- Equinox: Path___ Rises ____ Sets___ Sun’s Greatest Altitude/ Angle: Path ____ Greatest Duration of Insolation: (Longest Daylight hours): Path ____ ( )

http://www.youtube.com/watch?v=risM55KG2h8 Start at 3 minutes.

Explanation of Sun’s Path and Seasons

Which position correctly shows the direction of sunrise in New York on:

June 21 st _____ Dec. 21 st _____ March 21 st Sept. 23 rd _____ ______

Sun’s Apparent Path from NYS

http://www.youtube.com/watch?v

=3V3rmDG5J8A&feature=related North sky with star trails http://www.youtube.com/watch?v

=OxGr05elzSA&feature=relmfu east

Celestial Sphere:

What you see if you can see down to the horizon in all direction

Time Exposed Photos

Where is Polaris?

Can you find the North Star?

In which direction is the camera facing?

What’s wrong with this picture?

How do we know for sure that the Earth does in fact Revolve and rotate since we can’t actually feel it moving?

http://www.classzone.com/books/eart h_science/terc/content/visualizations/ es0403/es0403page01.cfm?chapter_n

o=visualization pendulum http://www.youtube.com/watch?v=nB 2SXLYwKkM pendulum

http://esminfo.prenhall.com/scien ce/geoanimations/animations/01_ EarthSun_E2.html

rotating and revolving earth