Why do people tend to cup their hands around listeners' ears when whispering to them?

Someone me with this: a mineral' is determined by its actomic structure.

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

If animal agriculture was eliminated, how much grain would become available for human consumption?