In the United States, warning agencies use a ______ – minute average wind speed to determine the intensity of a hurricane.

Climate normals are calculated using a ________ year average.

At what stage do tropical cyclones receive a name in the North Atlantic Ocean?

__________________ is a popular method of classifying climate regions which is based on the distribution of natural vegetation.

______________ is a measure of drought that uses precipitation, temperature, and available soil moisture.

When water changes state, it is called _______________.

A _____________ is a tropical cyclone that has a maximum 1-minute sustained wind of greater than 34 knots but less than 64 knots.

A 100-year flood has a ______ probability of occurring in any given year.

_____________ a persistent non-frontal system of organized convection forming over the tropical or subtropical ocean.

Which of the following is not a natural climate change factor?