The process of encroachment/invasion of deserts into regions that were once productive is termed as?

A permeable layer that transports water is called a(n) ____________________.

An erosional bedrock surface of low relief that slopes gently away from a mountain base is a(n):

A place where groundwater flows/seeps out of the ground is a(n) ____________________.

Deserts mostly occur at ____ latitudes.

The approximate percentage of the Earth’s surface that is covered by water is about:

A local aquiclude within a larger aquifer results in a(n):

Briefly explain what will happen to a stream’s behavior if one drains a lake that is a temporary base level for that stream.

The approximate percentage of Earth’s water that is in the oceans is:

A lake formed within a cirque is called a(n):