Which value corresponds to the prefix micro-?

Which value corresponds to the prefix micro-?

• A. 0.00001
• B. 0.000001
• C. 0.0001
• D. 0.001

Answer: (B)

Micro- means one millionth of a unit, which is 10^-6. In decimal form, that’s 0.000001, with six digits after the decimal. So the value that matches micro- is 0.000001. This prefix sits between nano (10^-9) and milli (10^-3) in size, so it's smaller than 0.001 but larger than 0.000000001. The other given values correspond to different powers of ten (for example, 0.001 is 10^-3, 0.0001 is 10^-4, and 0.00001 is 10^-5).

Micro- means one millionth of a unit, which is 10^-6. In decimal form, that’s 0.000001, with six digits after the decimal. So the value that matches micro- is 0.000001. This prefix sits between nano (10^-9) and milli (10^-3) in size, so it's smaller than 0.001 but larger than 0.000000001. The other given values correspond to different powers of ten (for example, 0.001 is 10^-3, 0.0001 is 10^-4, and 0.00001 is 10^-5).