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Geography notes CHAPTER ONE

Geography notes CHAPTER ONE - Geography notes An...

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Geography notes: 1/15/08 An Introduction to Physical Geography Earth is a system - has 4 subsystems: - Atmosphere: Gassy air above Earth’s surface - Biosphere: Living things on surface of the Earth - Lithosphere: Earth’s surface - Hydrosphere: Oceans and bodies of water Factors that impact life support on Earth: 1. Atmospheric composition 2. Material cycles (water, carbon, nitrogen cycles) 3. Availability of fuels a) nonrenewable: fossil fuels (gas and oil) b) renewable: solar, wind, geothermal **energy for humans would be burning off food ** - renewable means that something will always be available - Nonrenewable is knowing that there is a limited amount of a substance. Systems theory: involves an ordering of concepts so that we can describe/explain relationships between phenomena: 1. Establish spatial boundaries - spatial refers to a sort of location 2. Identify independent and dependent variables - for example, process vs. time 3. Establish relationships between variables (graphs are excellent tools for depicting trends ).
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