River levees are a good mitigation tool for restricting the damage from flooding in a particular area but they can result in greater flooding _______________________________ .

Why are hurricanes uncommon on the equator?

The term run-off refers to_____________________.

Flash floods are characterized by [1] moving water that often begins [2] a large rain storm in Zone [3] because this zone typically has [4] valleys and little place for the water to go but down. However, where the slope of the stream is [5] and the valley is [6], the velocity of the water is [7] because it is able to spread out and flooding often occurs after the storm.

Both the northern and southern hemisphere have [1] vertical circulation cells.

In the troposphere, change in wind direction with altitude is called [1], and change in wind velocity with altitude is called [2]. 

La Niña conditions result in [1] in the western Americas AND [2] in western Pacific countries.

Cold fronts are often associated with thunderstorms and severe weather because_______________________.

In this graph comparing average female heights across countries, what makes the visualization potentially misleading?

Giving a test to a group of students, the grades and gender are summarized below:     If one student is chosen at random, find the probability that the student was male.