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The Role Chemistry Has in Our Lives

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The Role Chemistry Has in Our Lives

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    1. The Role Chemistry Has in Our Lives CHEMISTRY’S RELATIONSHIP TO GLOBAL CLIMATE CHANGE

    2. What is Chemistry’s Role in Your Life? Synthetic Material Pharmaceuticals Cosmetics Cleaning Products Industrial Processes

    3. Climate Change UV radiation travels from the sun through space and strikes surfaces on the earth Radiant energy is absorbed and some transferred into thermal energy which radiates back out into space Some of that heat is trapped in molecules of the atmosphere (CO2, H20, CH4) These gases increase the temperature of the atmosphere

    5. Greenhouse Gases CO2, H20, CH4, and NO are greenhouse gases. They hold heat because of the flexibility of the bonds in the molecule. Stretching, bending, twisting, rotation, and vibration of bonds allows kinetic energy to be stored. Nitrogen and oxygen do not have the same flexibility as the greenhouse gases.

    7. Nutrient Cycles The exchange of elements from biotic to abiotic reserves in a ecosystem. Those elements that are cycled are water, carbon, nitrogen, phosphorous. The imbalance of nutrients within these cycles presents problems for the ecosystem. Human activity have made a great impact on these cycles.

    8. The Nitrogen Cycle Air – nitrogen gas (NOx) Soil – nitrates and ammonia Nitrogen Fixation Biotic – Proteins and Nucleic Acids Water – nitrates

    9. The Carbon Cycle Lithosphere – carbonates, fossil fuels Historically the Lithosphere is the largest reservoir for carbon Hydrosphere – carbonates and dissolved carbon dioxide gas Biosphere – carbohydrates, proteins, nucleic acids Atmosphere – carbon dioxide and methane

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