1) Read chapters 5 through 8 of the "Molnar AP Environmental Science" book. Continue
taking notes as you read, as this will help you to remember. Again, do not worry if you do not understand it all.
Remember, this is college material and we have plenty of time.
2) Read 10 pages of the "Smartypants" guide.
3) View an online video from the Learner.org series "The Habitable Planet" which covers the concepts you are learning.