Although this may seem like a minor topic, terrestrial biomes are referenced throughout the course.  Do yourself a favor and learn these biomes NOW, don't have regrets when you are reviewing for the May APES exam!

Water makes up over 71% of our planet.  This is another topic that is pretty important considering how many ecosystem services are provided by fresh and saltwater biomes.

Want to guess which topic is most requested as a review activity at the end of the year - that's right, the "Nitrogen Cycle".  It is a pretty complex cycle with a great deal of chemistry and microbial action, BUT - you only need to know some of its more essential basics.  You can use this one-pager as a quick review but remember you also need to know the anthropogenic effects of this cycle.

Reading lots of non-fiction can really increase the skills you need to succeed at high levels on tests like the SAT.  One of my favorite recent books is about phosphorus.  You won't go wrong if you read the "Devil's Element:  Phosphorus and a World Out of Balance by Dan Egan.  I guess the next best suggestion is to know what's on this one-pager about phosphorus.

This Google Slides summarizes the key things to know about each topic in Unit 1.  It is comprehensive but is only as useful as a summary of your reading of Unit 1 in your textbook.

Mr. Smedes is an AP Environmental Science teacher from Grand Rapids, Michigan who has developed (for a price) a whole bunch of very useful review materials.  Look at these yourself and see if they are worth the investment for you.  In roughly 26 minutes he reviews the key ideas of this first unit on ecosystems.

This is another overall video review of Unit 1 if you are looking for an additional quick video review.

This is still another overall video review of the first portion of Unit 1 if you are looking for an additional quick video review.

This is still another overall video review of the second portion Unit 1 if you are looking for an additional quick video review.