Spheres Answers

Nandini watches a soap bubble on a driveway. The bubble is in the shape of a hemisphere. When the bubble pops, the soap residue left behind is in the shape of a circle with the same diameter as the hemisphere. She measures the diameter of the bubble as 4 inches. What volume of air was in the hemisphere before the bubble popped?

If segment MN passes through the center, the most specific name for segment MN is .

What is the total surface area of the hemisphere? π in.2

Another student completed the same problem, but used the formula 3πr2 to determine the surface area. How would this solution compare to the surface area determined above? The solution would be the surface area determined above.

Hasan is painting a spherical model of a human cell for his science class. He uses 100π square inches of paint (in one coat) to evenly cover the outside of the cell. What is the diameter of Hasan’s cell model?

What is the surface area of the rounded part of the hemisphere? π in.2

What is the area of the circular base of the hemisphere? π in.2