Question

which of these is an example of investigating an intensive property?
weighing sand in a bag
measuring the length of wire
determining if a rock is magnetic
recording the volume of water in a cylinder

Explanation:

Intensive properties do not depend on the amount of matter. Checking if a rock is magnetic is an intensive property as it depends on the nature of the rock itself, not on how much of it there is. Weighing sand (depends on amount - extensive), measuring wire length (depends on amount - extensive), recording water volume (depends on amount - extensive).

Answer:

C. determining if a rock is magnetic