Friday, Sept 19, 2008 - Block 4B

Let students choose their own seats. Didn't work out well.

Collected Sun Labs (not many people handed it in)

Went over method of similar triangles. Showed how you could use it to find the height of a tree from the length of its shadow.

Students divided themselves into groups of 3 and made pictures of Sun, Moon, Earth.

One group demonstrated positions of Sun, Moon, and Earth for solar and lunar eclipses.

Went outside and students demonstrated solar and lunar eclipses as well as reviewing right hand rule for Earth going around the Sun, Moon going around the Earth, and Earth rotating about its axis.

Showed short video on lunar and solar eclipses.
Demonstrated with hula hoop showing inclination of Moon's orbit why you get two eclipse seasons each year.

Reviewed vocabulary. Next time quiz on diameter, radius, circumference, solar and lunar eclipses.