Are you keeping up?  Did you turned in your parent signed syllabus? (assigned Thursday

1. Are you keeping up? •  Did you turned in your parent signed syllabus? (assigned Thursday • O6MAR) • Have you turned in The Quest for Clean Water article questions and • graphic organizer? (assigned Friday O7MAR) • Have you completed the graphic organizer on Freshwater vs. Salt • Water and Surface Water vs. Groundwater? (assigned Tuesday • 11MAR) •  Have you completed the Criss-Cross Puzzle (due Friday 14MAR) •  Is your Reading Guide completed through section 6? • Today Thursday 13MAR14 • Unit 4 Section 2 The Global Water Cycle PowerPoint • Worksheet – How Much Water Does it Take?

2. Section 2: The Global Water Cycle http://www.whoi.edu/sbl/liteSite.do?litesiteid=18912

3. Water covers about three-quarters of Earth's surface and is a necessary element for life. • During their constant cycling between land, the oceans, and the atmosphere, water molecules pass repeatedly through solid, • liquid, and gaseous phasesbut the total • supply remains fairly constant. • http://www.indybay.org/newsitems/2012/04/28/18712261.php

4. Water vapor redistributes energy from the sun around the globe through atmospheric circulation. • Why does the happen? This happens because water absorbs a lot of energy when it changes its state from liquid to gas . http://earthobservatory.nasa.gov/Features/Water/page3.php

5. Niagara Falls American Falls on the left, Horseshoe Falls on the right and Bridal Veil Falls located to the left of American Falls Located on the Niagara River, which drains Lake Erie into Lake Ontario, the combined falls form the highest flow rate of any waterfall in the world, with a vertical drop of more than 165 ft. Niagara Falls is the largest falls on the globe. http://creative.sulekha.com/niagara-falls_613747_blog

6. " frozen " Niagara Falls in January, 2014.

7. Video - http://www.theguardian.com/weather/video/2014/jan/09/niagara-falls-freezes-over-us-cold-video Niagara Falls frozen

8. 11. Define latent heat. • The increased energy contained within water vapor after it has evaporated from liquid water. • 12. What moves latent heat around Earth? • Atmospheric circulation • What causes • latent heat to • be released? • Latent heat is • released when • water vapor • condenses • and produces • rain. http://www.physicalgeography.net/fundamentals/6c.html

9. What affects can human intervention have on our water supply? • Humans can alter the flux of water out of one store of water to another. • We can deplete the stores of • water that are most usable. • We pollute water making it not • suitable for human use and is • harmful to ecosystems. http://www.igb-berlin.de/Human-Aquatic_Ecosystem_Interactions.html

10. 14. State the three basic steps in the global water cycle. • water precipitates from the atmosphere • water travels on the surface and through • groundwater to the oceans • (3) water evaporates or transpires back to the • atmosphere from land or evaporates from the • oceans. http://technoscience.global2.vic.edu.au/2011/03/09/the-water-cycle/

11. What is freshwater and why does it exits? • Freshwater is water without a significant salt content. • It exists because precipitation is greater than evaporation on land. http://weloveyatours.blogspot.com/2012/11/the-freshwater-sea-lake-baikal.html

12. 16. How is groundwater formed and what is it? • Groundwater is formed from precipitation that is not transpired by plants or evaporated. It is the water that infiltrates through soils, flowing through rocks and sediments and discharging into rivers. http://archive.longislandpress.com

13. 17. Rivers are primarily supplied by groundwater, and in turn provide most of the freshwaterdischarge to the sea. Over the oceans evaporation is greater than precipitation, so the net effect is a transfer of water back to the atmosphere. In this wayfreshwaterresources are continually renewed by counterbalancing differences betweenevaporationandprecipitationon land and at sea, and the transport of water vapor in the atmosphere from the sea to the land. http://www.nature.org

14. 18. Nearly97 percent of the world's water supply by volume is held in theoceans. The other large reserves are groundwater (4percent) and icecaps and glaciers (2 percent), with all other water bodies together accounting for a fraction of1percent. Residence times vary from several thousand years in the oceans to a few days in the atmosphere. http://slowbuddy.com/photography/ocean-pictures/

15. 19. Solar radiation drives evaporation by heating water so that it changes to water vapor at a faster rate. This process consumes an enormous amount of energy—nearly one-third of the incoming solar energy that reaches Earth's surface. https://metofficenews.wordpress.com/tag/sun/

16. 20. On land, most evaporationoccurs as transpiration through plants: water is taken up through roots and evaporates through stomata in the leaves as the plant takes in CO2. A single large oak tree can transpire up to 40,000gallons per year. Much of the water moving through the hydrologic cycle thus is involved with plant growth. http://commons.wikimedia.org/wiki/File:A_few_trees_and_the_sun_(6009964513).jpg

17. 21. Since evaporation is driven by heat, it rises and falls with seasonal temperatures. In temperate regions, water stores rise and fall with seasonal evaporation rates, so that net atmospheric input (precipitation minus evaporation) can vary from positive to negative. http://soer.justice.tas.gov.au/2009/image/211/index.php

18. 22. Thehydrologic cycle is also coupled with material cycles because rainfall erodes and weathers rock. http://www.landforms.eu/shetland/weathering%20preglacial.htm

19. 23. Weathering breaks down rocks into gravel, sand, and sediments, and is an important source of key nutrients such as calcium and sulfur. http://terragardens.net/gravel

20. 24. Estimates from river outflows indicate that some 17 billion tons of material are transported into the oceans each year, of which about 80 percent is particulate and 20percent is dissolved. http://medina.cee.duke.edu/unesco_wwap_eval/