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Intro to Energy
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1st Law of Thermodynamics
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Gasoline
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Converting
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From this
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To
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This
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2nd Law of Thermodynamics
Energy can’t be converted without the loss of some usable energy
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2nd Law of Thermodynamics
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Loss of energy in the food chain
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Much of our energy goes to…
Converting energy results in heat being given off… That heat is not harvestable by other organisms
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Metabolism All chemical reactions in a cell
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Bear or Mouse Mice work harder to stay warm Higher muscle to fat ratio
More active in summer
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Photosynthesis Converting sun to food
Requires sunlight, CO2, and water Produces: O2 and Sugar
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The Process
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An anabolic pathway Store energy for later
Trees be like, “I want that sun energy later, I’m’a convert it”
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The problem with wind
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Cell phone analogy
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Cell phone analogy
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Cellular Respiration Convert food to energy
Requires organic substance and O2 Gives off: CO2 and Water
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The Process
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I’m gonna use that energy now
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Metabolic Pathway Nature ROCKS at recycling!!
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ATP pathway Put energy in to make ATP Can use that energy later
Can also use energy elsewhere
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Anabolic From lesser to greater complexity Build UP
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Catabolic From greater to lesser complexity BREAK down
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