1. Which of the following is the largest distance?
Lets go through the choices first.
A centimeter is equal to 1/100 of a meter, and is a metric unit of length.
A millimeter is 1/1000 of a meter, 10 millimeters is 1 centimeters, so a millimeter is incorrect.
A decimeter is equal to 1/10 of a meter, so therefore, it is greater than the centimeter and millimeter.
A kilometer is equal to 1000 meters, so therefore, it is the largest distance.
2. What is a metric base unit?
From the explanation above, I used meters as a metric base unit. The word "meter" is in each metric unit, so therefore, the answer is D, the standard unit that is used for each type of measurement.
<u>Final answers</u>:
Choice D, kilometer
Choice D, the standard unit that is used for each type of measurement
