Choose an appropriate metric unit for the mass of concrete in a section of sidewalk A: kilogram B: miligram C: gram D: meter
A: kilogram
The appropriate metric unit for measuring the mass of concrete in a section of sidewalk would be kilogram (A).
To understand why, we need to consider the size of the object being measured and the range of values typically associated with that object. In this case, concrete is a solid material used in construction, and it is generally quite heavy. The mass of concrete used in a section of sidewalk would typically be in the range of hundreds or thousands of kilograms, making kilogram the most suitable unit of measurement.
To measure the mass of the concrete, you would typically use a weighing scale. Place the section of sidewalk on the scale and record the mass in kilograms. If the scale is only available in a different metric unit, such as grams (C), you can convert the measurement to kilograms by dividing the number of grams by 1000.