Presentation on theme: "Water On Earth Learning Goal: Explain the water cycle using appropriate terminology and explain why we are still concerned with the quantity of water on."— Presentation transcript:
Water On Earth Learning Goal: Explain the water cycle using appropriate terminology and explain why we are still concerned with the quantity of water on earth
Why should we study water? 1.Without water, life would not exist on Earth 2.Water is a major issue in the West Maybe you have heard the word drought before 3.A very small percentage of water is available for human use, and it is being polluted everyday
Define the following using the next slide Condensation: Precipitation: Evaporation: Transpiration: Surface run off: Percolation: Return flow: Ground water flow:
Infiltration into the soil Condensation From vegetation Through the soil and rock to the water table
Will we run out of water? If the water cycle is correct, why do we have water issues? There is plenty of water, but not all of it is available to use. So, where is all the water?
WHERE ON THE EARTH IS ALL OUR WATER ? ? WHAT ARE THE CHOICES? 1.OCEANS 2.ATMOSPHERE 3.UNDERGROUND 4.RIVERS, LAKES, CREEKS (OR CRICKS), SWAMPS, PONDS ; SURFACE WATER 5.ICE FIELDS AND SNOWFIELDS AND GLACIERS Of these choices, where is the water found as a percent? Which are useful to humans?
A DEMONSTRATION OF THE DISTRIBUTION OF WATER ON OUR PLANET All the water on the earth Salt 97% = (970 mL / 1000mL) * 100% Fresh 3.0% = ( 30 mL / 1000 mL ) * 100% DISTRIBUTION OF FRESHWATER: a)Polar ice caps24.0 ml2.4% b)Groundwater4.0 mL0.4% c)Surface water1.0 mL 0.1% d)Water vapor1.0 mL 0.1%
Water source Source: Nace, U.S. Geological Survey, 1967 and The Hydrologic Cycle (Pamphlet), U.S. Geological Survey, 1984 Oceans317,000,000 Icecaps, Glaciers7,000,000 Groundwater2,000,000 Freshwater lakes30,000 Inland seas25,000 Soil moisture16,000 Atmosphere3,100 Rivers300 Total326,000,000 Water volume, in cubic miles % of total water How Much is Available?
So Why Is it important to Study Water? You will be testing the water quality of some wells in a town called Fruitvale. The first step is to collect background information on the towns water supply Second, you and your team will decide which wells you are going to test based on the information you collected, and the knowledge that the water flows from north to south in that town. Your goals: –Determine the source of the contamination –Determine how far it has traveled