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Water as a Resource
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Why is water special? Write down at least 3 reasons you can recall without looking at your notes about why water is special.
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Special Water Hydrogen bonds Filters/reflects harmful UV light
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Hydrogen Bonds Allow for
Changing state (gas, liquid, solid) over a relatively small temperature range. Staying liquid for as large a temperature range Needing a lot of energy to evaporate water Water’s ability to dissolve many compounds Water to rise up the side of a solid Expansion when frozen
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Temperature Stuff Changing state Staying liquid Evaporation
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Temp Stuff (cont.) Expansion when frozen -Heat
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Other Properties Move up the side of a solid
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Manipulation of water resources
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Damning our Ecosystems
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Disturbing Niches
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Question time!
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When groundwater is removed, the soil sinks in a process known as:
Saturation Stabilization Subsidence Streambed channelization Sustainability
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Evaporation potential None of the above
The amount of moisture in the air compared with how much moisture the air could potentially hold is known as Relative humidity Absolute humidity Precipitation Evaporation potential None of the above
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Hoover Dam and Glen Canyon Dam manage which river?
Mississippi River Colorado River Kissimmee River River Ouse Potomac River
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Coastal beaches and barrier islands are eroded by
Jetties Percolation Longshore currents Compaction Desalination
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Mangrove swamps that are endangered Forest bottomland that is flooded
Vernal pools are Mangrove swamps that are endangered Forest bottomland that is flooded Storm surges that are stagnant Temporary pools of water Bogs that serve as primary habitat
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Rivers and streams Soil moisture Oceans Snow and glaciers Atmosphere
Water is stored an average of 8 to 10 days in which of the following reservoirs? Rivers and streams Soil moisture Oceans Snow and glaciers Atmosphere
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Land masses hold what percentage of earth’s water?
97% 3% 0.001% 72% 66%
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In the zone of saturation In a drainage basin Nonrenewable
Resources such as groundwater that are being consumed faster than they can be resupplied are said to be Infiltrated Highly salinized In the zone of saturation In a drainage basin Nonrenewable
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In general, ocean salinity
Increases with precipitation Increases with depth Decreases with depth Is less than freshwater salinity Is less than groundwater salinity
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Ocean circulation is changed by
Wind Differences in water density Differences in salinity Differences in temperature All of the above
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Using excess groundwater in coastal regions causes
A sustainable water supply Condensation nuclei Surface water to decline Saltwater intrusion Both C and D
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Rainfall is 50% below average for a period of 10 days or more
A drought occurs when Rainfall is 50% below average for a period of 10 days or more Rainfall is 50% below average for a period of 21 days or more Rainfall is 70% below average for a period of 21 days or more Rainfall is 70% above average for a period of 21 days or more Rainfall is 70% below average for a period of 10 days or more
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