Fact 1: Ameasuring cup is used for measuring the volume of substances.

Fact 2: For any substance, the density is a measure of the mass of a unit volume of that substance.

Given the two facts above, answer the question "a measuring cup is used for measuring the what?" with the following options: 
- 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


 

   density of substances      