Lecture 6 - EARTH AND PLANETARY SCIENCES 80 Professor Berry...

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EARTH AND PLANETARY SCIENCES 80 Professor Berry 2/8/10 Lecture 6 ASUC Lecture Notes Online is the only authorized note-taking service at UC Berkeley. Do not share, copy or illegally distribute (electronically or otherwise) these notes. Our student-run program depends on your individual subscription for its continued existence. These notes are copyrighted by the University of California and are for your personal use only. D O N O T C O P Y Sharing or copying these notes is illegal and could end note taking for this course. ANNOUNCEMENTS Ok first of all, I want to make a comment for those who are on the waitlist. On Friday I made it so that all of those on the waitlist can get in. As far as I am concerned, everyone who wants to be in the class is in. For those who enrolled late, you must pick up and start the Strawberry Creek assignment from bSpace. The midterm will be on March 17 th , which is a Wednesday. We will not have a final exam. Instead on the final exam day, there will be a 2 to 3 page essay that will be due. That information I will have to give you in another week so, but it will come out on bSpace. Not every one of the power points that I show will be on bSpace, but today’s is. LECTURE Today I want to move on towards using the information that we’ve already gotten from Strawberry Creek and climate. I want to mention how climate interacts with the creek. This sets up the story between energy and fossil fuels and so on. Life on earth is sustained by the flow of energy from the sun, the cycling of matter and key nutrients through the biosphere, and gravity that keeps molecules in the atmosphere from flying into space. Some organisms produce food; others consume food. Biodiversity is found in the earth’s genes, species and ecosystems. Soil supplies most of the nutrients needed for plant growth, helps purify water, and stores carbon, which helps control atmospheric levels of carbon dioxide. This is an important idea, because soil holds and stores carbon. This can then contribute to the greenhouse gases. Soil is also helps to pick some nutrients and some wastes out of the water. Human activities are altering the flow of energy and the cycling of key nutrients through ecosystems. Just to give you an overview of organisms in the
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This note was uploaded on 09/10/2010 for the course EPS 207 taught by Professor Dreger,d during the Spring '08 term at University of California, Berkeley.

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Lecture 6 - EARTH AND PLANETARY SCIENCES 80 Professor Berry...

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