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 Underground water comes from precipitation that soaks into the ground.  The water underground trickles down between particles of soil and through cracks.

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Presentation on theme: " Underground water comes from precipitation that soaks into the ground.  The water underground trickles down between particles of soil and through cracks."— Presentation transcript:

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2  Underground water comes from precipitation that soaks into the ground.  The water underground trickles down between particles of soil and through cracks and spaces in layers of rock – pore spaces

3  Different types of rock and soil have different-sized spaces, or pores, between their particles.  Materials that allow water to pass through easily are called permeable.

4  When water soaks down into the ground, it passes through permeable materials.  Eventually it reaches an impermeable layer.  There, it stops trickling down and begins to fill the spaces in the permeable layer above it.

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6  Materials that do not allow water to pass through easily are called impermeable.

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8  An underground river has now been discovered beneath the mighty Amazon River, flowing miles below the surface.  Scientists detected this river after they analyzed data from 241 oil wells that were drilled in the 1970s and 1980s.  The river was unofficially named the Hamza by scientists at Brazil's National Observatory in honor of their colleague, geophysicist Valiya Hamza. 

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18  The aquifer was first tapped for irrigation in 1911.irrigation  Large-scale use for irrigation began in the 1930s and continued through the 1950s, due to the availability of electric power to rural farming communities and the development of cheap

19  Is adding water to crops to help them grow

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24  The permeable layer that becomes filled with water is called the saturated zone.  The level of the top of the water in the saturated zone is called the water table.  The layer of rocks and soil above the water table is called the unsaturated zone (permeable zone)

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26  A spring is a place where groundwater bubbles or flows out of cracks in the rock.

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29  An aquifer is an underground layer of rock or sediment where water has collected.  The water in an aquifer seeps through the permeable rock layers where it is stored.

30  People can obtain groundwater from an aquifer by drilling a well below the water table.  If a hole is drilled in the impermeable layer above it, the water flows out of the aquifer without being pumped.

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33  A well in which water rises because of pressure within the aquifer

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37  The water in some springs is warm or even hot.  The water is heated by hot rocks deep underground.

38  A geyser is a hot spring in which the water is under pressure.  From time to time, the pressure causes the hot water and steam to erupt into the air.

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43  https://www.youtube.com/watch?v=X4zA_Y PCyHs https://www.youtube.com/watch?v=X4zA_Y PCyHs  https://www.youtube.com/watch?v=wE8ND uzt8eg https://www.youtube.com/watch?v=wE8ND uzt8eg

44 1. How does water move through underground layers of soil and rock? 2. How do people obtain water from an aquifer?


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