The weather person says, “A fast-moving air mass will pass through the area, bringing rain and lower temperatures.” Which type of weather front is being described?

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?

Acanyon on the ocean floor at which the crust bends downward is called a(n)

The first mathematical theory of tides was introduced by: galileo kepler newton cousteau