1. Test is Thursday – these notes are pretty straight forward. I will have a test review sheet for you tomorrow and will be here for a review Thursday before school. If the following notes are in italics – no need to write them.

2. Now that we have discussed nutrient cycles, energy flow, and some of the types of symbiotic relationships that occur to pass energy and nutrients along, lets discuss where this happens.

3. The Biosphere

4. The Biosphere is the thin layer around the Earth’s surface in which life exists.

5. 1. It is about 32 miles thick.

9. 2. The biosphere is divided into three sections.

15. … those other gases …. A. water vapor (varies with latitude and proximity to an ocean) B. O3 Ozone C. Hydrogen gas, carbon monoxide, methane, etc.

21. The next slides are about that 2.5% that is freshwater.

22. a. About 75% of Earth’s freshwater is frozen in glaciers and at the poles (changing)

26. When you consider that we are trapped, with all other life, in a thin film around the Earth’s surface that provides us with the water, soil, and air we need to survive, it should be of the highest priority that we take care of it to insure our health and survival.

27. When you consider that we are trapped, with all other life, in a thin film around the Earth’s surface that provides us with the water, soil, and air we need to survive, it should be of the highest priority that we take care of it to insure our health and survival. Unfortunately that hasn’t been the case. Instead a relative few of one species (Homo sapiens) has exploited the biosphere to the detriment of ourselves and all other life on Earth.

28. When you consider that we are trapped, with all other life, in a thin film around the Earth’s surface that provides us with the water, soil, and air we need to survive, it should be of the highest priority that we take care of it to insure our health and survival. Unfortunately that hasn’t been the case. Instead a relative few of one species (Homo sapiens) has exploited the biosphere to the detriment of ourselves and all other life on Earth. Recognizing and understanding the damage and how to fix it is what Environmental Science is all about.