You are presented with the question "a measuring cup is used for measuring the what?" and the following answer choices: 
- sound of water
 - thickness of food
 - density of substances
 - Temperature
 - all liquids
 - creaminess of texture
 - objects that have mass
 - air mass over Earth's surface

Now knowing that ameasuring cup is used for measuring the volume of substances and for any substance, the density is a measure of the mass of a unit volume of that substance, choose the best answer.


 

   density of substances      