Question

Which unit would you use to measure the amount of water in a swimming pool?

mL
kg
L
cm

Answer 1

To measure the amount of water in a swimming pool, liters (L) would be the most appropriate unit. Liters are used for measuring larger volumes of liquids and are practical for the capacity of pools, as opposed to milliliters (mL), which are too small.

Step-by-step explanation:

If Darcy is filling up her swimming pool, the best unit to measure the amount of water needed would be in liters (L). This is because liters are a standard metric unit for measuring larger volumes of liquids. In the context of a swimming pool, which contains a large volume of water, milliliters (mL) would be impractical due to their small size. Kilograms (kg) could theoretically be used since 1 kilogram of water is equivalent to 1 liter, thanks to water's density of 1 g/cm³. However, liters directly measure volume, which is what we're interested in for the capacity of a pool. Therefore, liters are preferred when referring to the volume of water. Centimeters (cm) are a unit of length and are not suitable for measuring volume. If exceptionally large pools such as Olympic-sized pools are being considered, the amount of water might also be measured in kiloliters (kL).

Answer 2

If you want to describe the mass of the water in the pool,
then you'll express it in kilograms.

If you want to describe the volume of the water in the pool,
then you'll express it in Liters.

(Those two numbers will be pretty close to equal.)