The presence of liquid water on Earth’s surface is ________.

Rock or sediment between the water table and the land surface represents a(n) ________.

If sea level continues to rise and covers the city of Miami, the Florida coast will become a(n) ________.

The inner edge of a meander, where sediment is deposited, is a(n) ________.

The thickness of oceanic lithosphere is ________.

Continental lithosphere ________.

Which geologic event is NOT suspected as a source of major climate change and mass-extinction events?

The stream gradient of most rivers ________.

The deepest part of a curved stream channel, where the flow is fastest, is called the ________.

The lowest elevation to which a stream can downcut is the ________.