Rain

Snow forms

________ in the same way rain does, but in colder conditions.

sulfur dioxide

N /n When rain forms around certain types of pollutants, such as ________ and nitrogen oxide, the CCN react with water to make the rain acidic.

Dry desert regions

________ can get less than a centimeter (0.4 inches) of rain every year, while tropical rain forests receive more than a meter (3.2 feet)

CCN

Brightly colored ________, such as red dust or green algae, can cause colored rain.