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Unformatted text preview: - temperate sunlight more spread out, cooler-fluctuates more than tropics- northern & southern seasons opposite BIO 20 ABIOTIC 2 4. SOIL soil - reservoir for nutrients (incl. P & S)- formed from weathering of rocks textures - % diff size of soil particles- clay small, silt medium, sand large, gravel largest- loam balances clay-silt-sand 5. GEOGRAPHY microclimate- local weather in immed surroundings vegetation - cooler if more plants topography - valleys more humid- south-facing slopes sunny & warmer- north-facing slope shady & cooler- warmer nearer to ground rain shadow - upslope cools & rains- downslope warms & absorbs water 6. URBAN ENVIRONMENTS absorbs more sunlight- more if concrete, less if haze/smog radiates more heat - 6-8 warmer- more people, autos, bldgs, heaters lower relative humidity - less plants less evaporation - water drains away more fog - condenses around smog...
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