Reviews features of aquifers and the water table.
Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.
The Ogallala Aquifer is being rapidly depleted; to insure the furture of farming in the Great Plains farmers are planning conservation measures.
Sinkholes can occur in almost any type of rock but are most common in limestone and other karst toporaphy. People and property have been swallowed by sinkholes.