How is a solids volume measured?

Answer 1

For finding volume you can use water displacement. Get a amount of water (make sure you know what number and how much) and drop your item in the water. The water should have risen. The difference of the Displaced water and the starting water should get you your volume.

e.g. 16 mL of water, you drop a marble, the water is now 18 mL. So the volume of the marble is 2 mL.