On May 18,1980,a massive eruption of Mt.St.Helens in Washington State sent a huge plume of ash high into the air.Over the next two weeks,the ash traveled around the world.To move that far,the ash would have to
A)dissolve in the nitrogen of the air.
B)combine with moisture in the troposphere.
C)bind to aerosols in the lithosphere.
D)reach into the stratosphere.

Question

Quizplus · Accepted Answer

To travel around the world, the ash would have had to reach into the stratosphere, which is the layer of the atmosphere above the troposphere where most weather occurs. In the stratosphere, air currents can carry particles long distances.

On May 18,1980,a Massive Eruption of Mt