The dust bowl was caused by a
a. windstorm.
b. drought.
c. tornado.
d. famine.

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

Match the region in column 1 to the river in column 2