plugin-Earth_122_Ch03_notes

plugin-Earth_122_Ch03_notes - 1/11/2009 Introduction to...

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1/11/2009 1 Introduction to Environmental Science Introduction to Environmental Science: 3. Matter, Energy, and Life Earth 122 1 Prof. Walter A. Illman Matter, Energy, and Life 2 Nature does nothing uselessly. Aristotle
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1/11/2009 2 Objectives Describe matter, atoms, and molecules and give simple examples of the role of four major kinds of organic compounds in living cells. Define energy and explain the difference between kinetic and potential energy. Understand the principles of conservation of 3 matter and energy and appreciate how the laws of thermodynamics affect ecosystems. Objectives Know how photosynthesis captures energy for life and how respiration releases that energy to do useful work. Define species , populations , communities , and ecosystems and understand the ecological significance of these levels of organization. 4 Discuss food chains, food webs, and trophic levels in biological communities and explain why there are pyramids of productivity in the trophic levels of an ecosystem.
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1/11/2009 3 Objectives Compare the ways that carbon, nitrogen, sulphur, and phosphorus cycle within ecosystems and globally. 5 Outline From Atoms to Cells Energy and Matte Energy and Matter Thermodynamics and Energy Transfers Photosynthesis / Respiration Energy for Life From Individuals to Ecosystems 6 Food Chains Ecological Pyramids Material Cycles and Life Processes
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1/11/2009 4 FROM ATOMS TO CELLS Matter Everything that has mass and takes up space. Solid Liquid Gas Elements Substances that cannot be broken down into simpler forms by ordinary chemical reactions. 7 Periodic Table Atoms, Molecules and Compounds Atoms Smallest particles exhibiting characteristics of the element characteristics of the element. Protons Neutrons Electrons Atomic Number Number of protons Isotope Forms of an element differing in atomic mass. (Different number of neutrons). 8 Molecule Two or more atoms joined together. Compound Molecule containing at least 2 types of atoms
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1/11/2009 5 9 Chemical Bonds Chemical Bond Forces (chemical energy) holding atoms together in molecules holding atoms together in molecules.
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This note was uploaded on 10/31/2011 for the course EARTH 122 taught by Professor Calia during the Spring '08 term at Waterloo.

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plugin-Earth_122_Ch03_notes - 1/11/2009 Introduction to...

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