Physical and Ecological Process. What factors contribute to how the Earth’s surface is shaped? ...
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Physical and Physical and Ecological Ecological ProcessProcess
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What factors contribute to how the Earth’s surface is shaped?
Earthquakes: a sharp release of energy that sends waves traveling through the Earth’s crust; can be a result of fault lines or volcanoes
Floods: a high water level that overflows the natural riverbank along any portion of a stream/river
Volcanoes: a mountainous landform at the end of a magma conduit, magma rises causing an eruption
Erosion: wind, water, or ice that dislodges, dissolves, or removes surface material
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How do humans impact the earth’s surface?
Water diversion management: Aral Sea- saltwater lake that was once the
fourth largest lake in the world, but due to irrigation the two rivers that feed into the Aral Sea the sea is shrinking. Consequences: fishing destroyed, harsher climate now, loss of drinking water
Colorado River- river diverted for drinking water and irrigation, problem: the river flows to Mexico but the US was consuming so much that not much was going in to Mexico, a treaty went into effect requiring the US to a specific amount of water into Mexico
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How do humans impact the earth’s surface?
Water diversion management: Aswan High Dam- dam across the Nile in
Egypt, 365ft high and 11,800ft wide, water is used for irrigation, problem: farmlands are not receiving silt from the Nile river’s floods
Silt: earthy matter, fine sand or the like carried by moving or running water and deposited as a sediment
Canals- an artificial water way used for navigation and irrigation
Irrigation- the artificial application of water to land to assist in the production of crops
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How do humans impact the earth’s surface?
Changing landscapes: Agricultural terracing (e.g., China, Southeast
Asia)- a series of flat areas made on a slope for cultivation
Polders (e.g., Netherlands) a piece of low-lying land reclaimed from the sea or a river by dykes
Deforestation (e.g., Nepal, Brazil, Malaysia)- clear an area of trees or forests
Desertification (e.g., Africa, Asia) the expansion of deserts worldwide related to poor agriculture practices, improper soil-moisture management, erosion, and deforestation
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How do humans impact the earth’s surface?
Environmental changes Acid rain (e.g., forests in Germany,
Scandinavia, China and Eastern North America)- rainfall made acidic by pollution, causing damage to vegetation, lakes and buildings
Pollution (e.g., Mexico City, Chernobyl, oil spills)- the introduction of harmful substances of products into the atmosphere
Smog- smoke or other atmospheric pollutants combined with fog in an unhealthy or irritating mixture
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How do humans impact the earth’s surface?
Environmental changes Global warming- an increase in the earth’s
average temperature, causing changes in climate and may result from the greenhouse effect
Greenhouse effect: trapping of solar radiation in the atmosphere due to high concentrations of gases that absorb heat like carbon dioxide
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How do humans impact the earth’s surface?
Influence of technology Agriculture (e.g., fertilizers, mechanization)
Pro’s- use of fertilizers has helped to grow better and stronger plants and keep farm land fertile; mechanization can quicken harvesting and production
Con’s- erosion can cause fertilizers to runoff, causing water pollution; mechanization can cause pollution (machines) and raise costs making it hard for small farmers to compete
Energy usage (e.g., fossil fuels, nuclear)
Pro’s: fossil fuels and nuclear power run our cars, heat our homes, gives us power
Con’s: Oil spills, pollution, global warming and acid rain
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How do humans impact the earth’s surface?
Influence of technology Energy usage (e.g., fossil fuels, nuclear)
Pro’s: fossil fuels and nuclear power run our cars, heat our homes, gives us power
Con’s: Oil spills, pollution, global warming and acid rain, Chernobyl
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How do humans impact the earth’s surface?
Influence of technology Transportation (e.g., road building, railways)
Automobiles (e.g., parking lots, suburbs)
Airplanes (e.g., airport expansion, noise)
Pro’s: helps to move people and goods from one place to another quickly, lets people travel outside of their neighborhoods, allows people to work and live in different areas
Con’s: Pollution from cars, busses, airplanes could lead to global warming, vegetation cleared for buildings and parking lots, noise pollution
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How do humans impact the earth’s surface?
Environmental impact on humans Settlement patterns
Housing materials
Agricultural activity
Types of recreation
Transportation patterns
These are all dependant on where resources are located and the availability to the resources.
These are all defined by climate and regions where people live.