The sun supplies the earth with light energy which the earth turns into heat.  This is what causes the air, land, water, ice and living things to affect climate in various ways.  Consult the text p.325-335.
Homework:  p.329 #5; p.335 #7

We discussed climate and weather and the things that affect climate.  Consult the text p.319-324.  There is a note on the Climate Change page called "climate intro".
Homework:  p.321 #1, 5, 6, 8, 9; p.324 #1, 2