Question

The diagram illustrates the water cycle.

Parts of the water cycle labeled U through Z. U: Water moving from a lake into the clouds. V: Clouds. W: Water falling from clouds as rain and snow. X: Water moving from ground to the clouds. Y: Water flowing down the mountainside into a lake. Z: Underground water going into lake.
Which letter represents runoff?

U
W
X
Y

Answer 1

Y

Runoff is surface water flowing over land into rivers or lakes — that matches Y (water flowing down the mountainside into a lake).