Question

7.The mass of a grain of sand is approximately 2.8×10^−11 grams

Select from the drop-down menu to correctly complete the statement.
The mass of a grain of sand is approximately 2.8×10^−8

Answer Choices:
A. Milligram
B.Gram
C.Killogram

Answer 1

The number is made 1,000 times greater and so the units must be made 1,000 times smaller. The answer is "A" milligrams.