Yes, you're on the right track. It could also be a wadi.
http://dictionary.reference.com/browse/wadi
What may form when falling precipitation runs off the surface of the ground? Explain how the form of precipitation may affect runoff.
I don't understand what they are asking. What do they mean by "What may form?" does it mean like a puddle? or mudslide? or something?
2 answers
Thank you!