Scientists called the new phenomenon, witnessed in May 2009, of straight line, 100 mph winds with an eyelike structure and a path of destruction 100 miles wide a

Climate regions are separated on the Köppen climate classification map as an abrupt line. In reality, these are really ____________________

Fill in the blank(s) with correct word

Volcanic eruptions are an important natural source of ____

a. ?benzene b. ?ozone c. ?sulfur dioxide d. ?carbon monoxide e. ?chlorofluorocarbons

When volcanoes erupt, they emit ________ into the atmosphere, resulting in a cooling effect on the planet

A) sulfur dioxide B) methane C) water vapor D) nitrous oxide E) particulates

Most cloud-to-ground lightning flashes consist of a single return stroke

Indicate whether the statement is true or false