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Geography

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G e o g r a p h y

Chapter 9: * 70% of the freshwater goes to the agricultural sector * If lakes dried up, temperature would rise * Lack of rainfall and increased evaporation can lead to drought * Dry soil, dry air, and high winds can cause wildfires * 9 of 10 wildfires are caused by humans, lightning is the largest natural cause

Chapter 10: * 70% of the earth is covered in water * Water flows in rivers, it picks up small amounts of mineral salts from the rocks and soil of the river beds. The water evaporates in oceans but the salt does not * The rise and fall of the surface caused by the sun, moon and earth cause tides * Spring tide: full/new moon, Neap tide: first/last quarter moon

Chapter 11: * Nitrogen and oxygen make up most of the atmosphere * Permanent gases remain in the atmosphere, variable gases fluctuate at a given time and place in the atmosphere * Water vapor content is the greatest close to the surface * Decay of vegetation and exhalation of animals is a source of carbon dioxde, the breakdown of bacteria found in rice paddies and livestock is a source of methane * Lapse: lack of radiative heating and not many air molecules…inversion: reversal of the normal decrease of air temperature with altitude, or of water temperature with depth. * Troposphere: Lapse, stratosphere: inversion, mesosphere: lapse, thermosphere: inversion * Auroras: thermosphere, ozone layer: stratosphere, weather: troposphere, shooting stars: mesosphere.

Chapter 12: * Humidity is the amount of water vapor present in the air at a given time. * Dew point is the temperature at which air will reach saturation * Saturationair is holding its maximum amount of water vapor * Sling psychrometer measures relative humidity * How to change relative humidity inc/dec the amount of water vapor, change the temperature * Cloud a collection of water droplets of ice particles suspended in the air. * Vertical: cumulus clouds; made of ice and water * Low: stratus clouds; made of water droplets * High: cirrus clouds; made of ice * Middle; made of ice or water

Chapter 12: * The water cycle is a closed system * Adiabatic process nighttime cooling allows for dew and frost to form * Gases expand temp dec * Gases compress temp inc * DALR: 10 degrees C per 1000m: SALR 4-9 degrees C per 1000m * Uplift methods: * Convection * Orographic * Convergence * Frontal * Condensation nuclei: water vapor collects on it * Rain drops are not tear shaped * Tipping bucket, and rain gauge measure rain Chapter 13: * Standard sea level pressure 1013 mb * Air moves in response to differences in atmospheric pressure * Tightly packed isobars indicate strong pressure gradient and windy conditions * Measure wind: anemometer, wind vane, wind sock * Coriolis effect: the deflection of a moving object based on the earth’s rotation * Strongest: the poles * Weakest: the equator Chapter 14: * Jet stream: `

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