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water

Why did the earliest civilizations arise in river valleys?

Subject: 
World History
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Asia
Fertile Crescent
Mesopotamia
Civilizations
Tur Abdin
Ancient Near East
Tigris
Silt
water
Euphrates
Valley
Nile
Environment

Why did the earliest civilizations arise in river valleys? Plant domestication set the scene for the emergence of civilization, and if there is one thing plants cannot live without, it is water. Most people in early food producing societies lived in villages near rivers. Mesopotamia, the first civilization, was formed between the Tigris and Euphrates Rivers. There, not much rain fell, so they used water from the rivers to cultivate the crops. Its warm climate called for good soil, and the Nile regularly deposited silt.
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Bob Jones PPT Notes -- Chapter 9b

Subject: 
Chemistry
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Chemistry
Chemical reactions
Stoichiometry
Limiting reagent
Mole
Zinc
Neutralization
water
Yield

Stoichiometry 1 Literally means ?to measure the elements? Answers questions like?How much is needed?? and ?How much is produced?? Stoichiometry Unit analysis 365 days 1 year 24 hrs 1 day 3600 sec. 1 hr 1 year How many seconds are in a year? = 31,536,000 sec. Unit analysis We use unit analysis in stoichiometric problems also. Grams-to-moles conversion factors are found in the periodic table. Unit analysis Mole-to-mole conversion factors are found in the coefficients of the equation. A mole-to-mole conversion changes moles of one substance to moles of another substance. ?Skeleton Equation?

Bob Jones PPT Notes -- Chapter 6c

Subject: 
Chemistry
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Chemistry
Chemical bonding
matter
Chemical bond
Covalent bond
Network covalent bonding
Properties of water
Ionic bond
Solid
water
Glass
molecule

Properties of Compounds 1 Covalent distinct molecules held together by intermolecular forces relatively weak attractions, therefore low melting points not dense or hard poor heat and electricity conductors 2 Network Covalent exceptions continuous 3-D pattern?crystal Examples: diamonds, silicates 3 Network Covalent hard and brittle high melting points glassy luster 4 Ionic strong bonds, therefore high melting and boiling points hard solids can be split water-soluble good e? conductor in H2O, not as a solid 5 Ionic substances have low melting points. Ionic substances have low boiling points. Ionic substances don?t dissolve in water. Ionic substances are brittle. Question Because ionic bonds are strong, 6 Metallic carry electrons have luster (shine) malleable ductile 7 8

Campbell Biology Test Bank Chapter 3

Subject: 
Biology
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Chemistry
Bases
Equilibrium chemistry
Acid-base chemistry
Inorganic solvents
Oxides
PH
Properties of water
water
Hydroxide
Acid
Chemical reaction

Campbell's Biology, 9e (Reece et al.) Chapter 3 Water and Life Life evolved in the ocean, and the chemistry of life occurs in an aqueous environment. These questions explore the properties of water that are important to sustain life?s chemical processes, organismal physiology, and interactions of organisms with their environment. Quantitative properties such as heat content, molarity, and pH are also addressed. A few questions address how human activities affect the global environment through acid rain and acidification of the ocean. Multiple-Choice Questions 1) In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) van der Waals interactions.

Oceans

Subject: 
Environmental Science
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Oceanography
Physical oceanography
Physical geography
water
Coral reefs
Fisheries
Ocean current
Upwelling
Thermohaline circulation
Ocean gyre
Atlantic Ocean
Coral
Environment

Oceans Oceanography Study of the physical ocean Cover 71% of the Earth Contains 97% of its surface water Marine Ecosystems Cover 70% of the Earth?s surface Essential for: Biodiversity, Terrestrial Health, Production of O2, Climate and Food. Estuaries Coastal Partly enclosed One or more rivers flow into them Water is brackish (a mixture of fresh and salt water) Estuaries are among the most productive ecosystems on Earth Makes lots of biomass Lots of plant growth/m2 A lot of life in the area Nurseries for fish, crustaceans and vertebrates Services Aquatic nurseries Protected harbors Commercial Fishing, Recreational Fishing Habitat for non-aquatic animals, such as bald eagles, shorebirds Threats Many near populated areas May be filled for development Pollutants

Water Pollution

Subject: 
Environmental Science
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water
Environment
water pollution
earth
Aquatic ecology
Water supply
Sewerage
Environmental engineering
Wastewater
pollution
Greywater
Oil spill

Water Pollution The contamination of some body of water due to human activity that has some type of negative impact on organisms Point Sources: Distinct locations that pump waste into a waterway (you can point to it. Ex; This pipeline is leaking waste) Located at specific places Easy to identify, monitor, and regulate Non-Point Sources: different areas such as an entire farming region that pollutes a waterway (The bottle that?s floating in the ocean) Broad, diffuse areas Difficult to identify and control Expensive to clean up Human Wastewater Water produced by human activities such as human sewage from toilets and gray water from bathing and washing clothes our dishes Bacteria in wastewater sucks out the oxygen in it

Chapter 4 Notes

Subject: 
Environmental Science
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Physical oceanography
earth
Atmospheric sciences
Oceanography
Thermohaline circulation
Upwelling
Ocean current
Ocean gyre
Atlantic Ocean
Convection
water
Ocean
Environment

TRINI SOZA, 5h PERIOD. Chapter 4 ? pgs 88-98, pgs 108-112 MC 1-5, 11 FRQ #1 Chapter 14 ? pgs 381-185,, 194-202 FRQ # 1, 2 pg. 390 Global processes determine weather and climate Weather includes temperature, humidity, clouds, precipitation, wind speed and atmospheric pressure Climate means the average weather that occurs in a given region over a long period of time Northern areas and South Poles are colder than those closer to the equator Areas at high elevations are colder than areas in lower elevation Areas near the equator receive tremendous amounts of rain Regions at latitudes around 30 degrees N and S receive very little rain Differences in temperature and precipitation determine which organisms can survive in specific areas

Chapter 4 and 14 Notes

Subject: 
Environmental Science
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Physical oceanography
earth
Atmospheric sciences
Oceanography
Thermohaline circulation
Upwelling
Ocean current
Ocean gyre
Atlantic Ocean
Convection
water
Ocean
Environment

TRINI SOZA, 5h PERIOD. Chapter 4 ? pgs 88-98, pgs 108-112 MC 1-5, 11 FRQ #1 Chapter 14 ? pgs 381-185,, 194-202 FRQ # 1, 2 pg. 390 Global processes determine weather and climate Weather includes temperature, humidity, clouds, precipitation, wind speed and atmospheric pressure Climate means the average weather that occurs in a given region over a long period of time Northern areas and South Poles are colder than those closer to the equator Areas at high elevations are colder than areas in lower elevation Areas near the equator receive tremendous amounts of rain Regions at latitudes around 30 degrees N and S receive very little rain Differences in temperature and precipitation determine which organisms can survive in specific areas

Freshwater outline case study

Subject: 
Environmental Science
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water
Environment
earth
water pollution
Aquatic ecology
Hydrology
Environmental soil science
Sewerage
Aquifer
Groundwater
Water table
Wetland
fresh water AP Environmental

Freshwater chapter AP Environmental case study: The case study for this chapter is centered on the Colorado River and Las Vegas. The river supplies many states with the necessary water for people to live in the area, but as of late the river has been drained. This is due in part to the city of Las Vegas using ?more than their fair share? of the water. The city is in the middle of a very dehydrated area and as a result the city uses more and more water each year as it grows. This is considered and environmental concern in that the freshwater from the river is being consumed at a rate considered to be unsustainable to the current state of freshwater usage. Without any signs of water usage slowing in Las Vegas and other cities, the river is gradually being drained away.

Freshwater outline case study

Subject: 
Environmental Science
Rating: 
0
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Tags: 
water
Environment
earth
water pollution
Aquatic ecology
Hydrology
Environmental soil science
Sewerage
Aquifer
Groundwater
Water table
Wetland
fresh water AP Environmental

Freshwater chapter AP Environmental case study: The case study for this chapter is centered on the Colorado River and Las Vegas. The river supplies many states with the necessary water for people to live in the area, but as of late the river has been drained. This is due in part to the city of Las Vegas using ?more than their fair share? of the water. The city is in the middle of a very dehydrated area and as a result the city uses more and more water each year as it grows. This is considered and environmental concern in that the freshwater from the river is being consumed at a rate considered to be unsustainable to the current state of freshwater usage. Without any signs of water usage slowing in Las Vegas and other cities, the river is gradually being drained away.

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