Earth Science: Chapter 10 Assessment
Of the following materials, which is the most porous?
a well-sorted sand
What does hard water usually contain?
calcium
What is the major source of freshwater in the US?
groundwater
Where is groundwater closest to the Earth's surface?
in stream valleys
What happens to most of the precipitation that falls on land?
it evaporates
Which rock type is most easily dissolved by groundwater?
limestone
What is the main characteristic of an aquifer?
permeability
Where is most freshwater found on Earth?
polar ice caps and glaciers
What source usually replenishes groundwater?
precipitation
Which of the following is a common groundwater problem in coastal areas?
saltwater contamination
Of the following materials, which is the most permeable?
sandstone
Which of the following are typical features of karst topography?
sinkholes
What are the cone-shaped dripstone deposits that are found on the floor of caves?
stalagmites
What do artesian quifers always contain?
water under pressure