Water as a Resource Why is water special

Water as a Resource

Why is water special? • Write down at least 3 reasons you can recall without looking at your notes about why water is special.

Special Water • Hydrogen bonds • Filters/reflects harmful UV light

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

Temperature Stuff • Changing state • Staying liquid • Evaporation

Temp Stuff (cont. ) • Expansion when frozen -Heat

Other Properties • Move up the side of a solid

MANIPULATION OF WATER RESOURCES

Damning our Ecosystems

Disturbing Niches

QUESTION TIME!

When groundwater is removed, the soil sinks in a process known as: A. B. C. D. Saturation Stabilization Subsidence Streambed channelization E. Sustainability

The amount of moisture in the air compared with how much moisture the air could potentially hold is known as A. B. C. D. E. Relative humidity Absolute humidity Precipitation Evaporation potential None of the above

Hoover Dam and Glen Canyon Dam manage which river? A. B. C. D. E. Mississippi River Colorado River Kissimmee River Ouse Potomac River

Coastal beaches and barrier islands are eroded by A. B. C. D. E. Jetties Percolation Longshore currents Compaction Desalination

Vernal pools are A. B. C. D. E. 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

Water is stored an average of 8 to 10 days in which of the following reservoirs? A. B. C. D. E. Rivers and streams Soil moisture Oceans Snow and glaciers Atmosphere

Land masses hold what percentage of earth’s water? A. B. C. D. E. 97% 3% 0. 001% 72% 66%

Resources such as groundwater that are being consumed faster than they can be resupplied are said to be A. B. C. D. E. Infiltrated Highly salinized In the zone of saturation In a drainage basin Nonrenewable

In general, ocean salinity A. B. C. D. E. Increases with precipitation Increases with depth Decreases with depth Is less than freshwater salinity Is less than groundwater salinity

Ocean circulation is changed by A. B. C. D. E. Wind Differences in water density Differences in salinity Differences in temperature All of the above

Using excess groundwater in coastal regions causes A. B. C. D. E. A sustainable water supply Condensation nuclei Surface water to decline Saltwater intrusion Both C and D

A drought occurs when A. Rainfall is 50% below average for a period of 10 days or more B. Rainfall is 50% below average for a period of 21 days or more C. Rainfall is 70% below average for a period of 21 days or more D. Rainfall is 70% above average for a period of 21 days or more E. Rainfall is 70% below average for a period of 10 days or more