31. The density of an object is 10 g/cm³. If the volume of the object is 3 cm³, what is its mass?
a) 0.3 g
b) 3 g
c) 7 g
d) 30 g
32. Which of the following objects would float in water?
a) An object with a density of 0.8 g/cm³
b) An object with a density of 1.2 g/cm³
c) An object with a density of 4 g/cm³
d) An object with a density of 8 g/cm³
33. The density of a gas is typically measured in:
a) grams per cubic centimeter
b) kilograms per cubic meter
c) grams per liter
d) kilograms per liter
34. Which of the following statements is true about the density of a substance?
a) It is always greater than 1 g/cm³
b) It is always less than 1 g/cm³
c) It can be greater than or less than 1 g/cm³
d) It is always equal to 1 g/cm³
35. The density of a substance is directly proportional to its:
a) Mass
b) Volume
c) Temperature
d) Composition
