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Natural environment

Chapter 18 Powerpoint

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Chapter 18: Chemistry of the Environment Priyal Patel AP Chemistry 0pd 18.1 Earth?s Atmosphere Temperature varied due to altitude Decreases with increasing altitude Layer of atmosphere Troposphere Stratosphere Mesosphere Thermosphere Composition of the Atmosphere Not uniform Bombarded with radiation and energetic particles Lighter atoms rise to top N2 triple bond for between Nitrogen atoms O2 Much more reactive Reacts to form oxides 18.2 The Outer Regions of the Atmosphere Outer portion of atmosphere is important in determining conditions of life Upper layer forms outer defense against radiation and high-energy particles Photodissociation Rupture of a chemical bond resulting form absorption of a photon by a molecule Does not form ions Forms two neutral particles

ecology

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Ecology-A Study of Relationships Ecology means the study of the home Ecology is the study of organisms in their natural environment Biosphere is everywhere that life exists Viewing planet Earth from Space Satellites are an economical way to gather data; they have sensors, these gather data quickly from a very large region, and they last a long time Electromagnetic radiation Total ozone-mapping spectrometer Understanding environmental interactions allows us to predict the effects of human activity Biomes- Climatic Zones of Life Biome- a large geographic region determined by the climate and soil type Climate- average weather pattern over a long period of time Ecosystem- a Functional Unit Ecosystem is the Functional Unit because biome is too big to conduct research

Chapter 1 Outline

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Chapter 1: Introducing Environmental Science and Sustainability *Rachel Carson demonstrated how human activities in one context (pesticides) could profoundly alter wildlife. Thus, human activities alter the environment that sustains life on Earth. Human Impacts on the Environment Earth is remarkably suited for life Vast supply of water, habitable temperature, sunlight, etc. Earth?s abundance in natural resources allows organisms to evolve Raw materials provided 3.8 billion years ago (life exists on earth) Human activities disrupt global systems (ie. climate change) Increasing Human Numbers Driver of all other environmental problems is large population in cities (ie. 2007 Tokyo ? 35.7 million) Worldwide: 3 billion people 1960 ? 6.9 billion people currently

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