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SCI. Ch. 2 Sec. 5
Water Underground
Question | Answer |
---|---|
How does water get underground? | it trickles down between particles of soil and through cracks and spaces in layers of rock |
Pores | different sized spaces |
How easily water moves through materials depends on what two things? | the size of the pores and how connected each other are |
Permeable | materials that allow water to easily pass through or permeate |
Give examples of permeable | sand and gravel |
impermeable | materials that water cannot pass through easily |
Give examples of impermeable | clay and granite |
True or false: once water reaches an impermeable layer it is trapped | true |
Saturated zone | area of permeable rock or soil that is totally filled, or saturated, with water |
What tells you how deep you must dig to reach groundwater? | knowing the depth of the water table |
unsaturated zone | layer of the rocks and soil about the water table |
Aquifer | any underground layer of rock or sediment that holds water |
What factors affect how fast water moves in an aquifer? | how steeply the aquifer slopes and how permeable the rocks are |
How can people obtain groundwater from an aquifer? | by drilling a well below the water table |
Recharge | new ater that enters the aquifer from the surface |
artesian well | a well in which water rises because of pressure within the aquifer |
Springs | groundwater bubbles or flows out or cracks in the rock |
geyser | type of hot spring from which the water bursts periodically into the air |
How does a geyser form? | when very hot water that has been circulating deep underground begins to rise through narrow passages in the rock |