2.6 Pre-assessment

People can obtain groundwater by drilling a well

• above the water table

• into an aquifer

• into the unsaturated zone

• into the impermeable layer

An aquifer is a(n)

• underground layers of rock or sediment that holds water

• well in which water rises because of pressure

• type of hot spring from which the water periodically erupts

• place where groundwater bubbles or flows out of cracks in the rock

Water that fills the cracks and spaces in underground soil and rock layers is called

• salt water

• rainwater

• groundwater

• water vapor

Hot water that is circulated underground and begins to rise through narrow passages or rock

• aquifer

• salt water

• groundwater

• geyser

If a cave becomes large enough or too close to the surface, the land above it may collapse and form a

• hill

• sinkhole

• mountain

• plateau

A hole dug into an aquifer to supply water to the surface

• well

• permeable

• unpermeable

• spring

When water can easily pass through sand or rock it is called

• well

• artesian well

• impermeable

• permeable