Name: ----------------------------------------------
Date -----------------------------------
Period__________
Answer Key
Density Summative Assessment
Directions: Solve the following problems. Be sure to show your
work
1. Calculate the density of a substance that has a mass of 25.0 grams and a volume
of 29.4 cm3? ( Density= Mass/Volume)
Answer: D= M/V
D= 25.0g/29.4cm3 = 0.85g/cm3
2. A piece of wood that measures 5.0 cm by 6.0 cm by 4.0 cm has a mass of 80.0
grams. What is the density of the wood? Would the piece of wood float in
water? (volume = L x W x H) ( Density= Mass/Volume)
Answer: Volume= L x W x H
Volume= 5.0cm x 6.0cm x 4.0cm= 120cm3
D= M/V
D= 80.0g/120cm3 = 0.67g/cm3
The object will float considering the fact that the object’s density is less than that
of water. The density of water is 1.
3. A cup of gold colored metal beads was measured to have a mass 425 grams. By
water displacement, the volume of the beads was calculated to be 48.0 cm3. Given
the following densities, identify the metal. ( Density= Mass/Volume)
Gold: 19.3 g/cm3
Copper: 8.86 g/ cm3
Bronze: 9.87 g/ cm3
Answer: D= M/V
D= 425g/48.0cm3= 8.85g/cm3
4. The density of aluminum is 2.70 g/mL. If the mass of a piece of aluminum is 244
grams, what is the volume of the aluminum? ( Density= Mass/Volume)
Answer: D= M/V
V= M/D
V= 244g/2.70g/ml=90.37ml