What forms when a loop of a river becomes cut off from the rest of the stream?
a. a tributary
c. an oxbow lake
b. a stream
d. groundwater

What is the difference between emigrate and immigrate? ?

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false