Density Review for Test 2025

The following liquids are poured together in a beaker: alcohol (density=0.79), corn syrup (density=1.38), water (density=1.0), and cooking oil (density=0.93).  Which of these liquids will sink to the bottom of the beaker?

• alcohol

• corn syrup

• water

• cooking oil

Answer explanation

Corn syrup, with a density of 1.38, is denser than alcohol, water, and cooking oil. Therefore, corn syrup will sink to the bottom of the beaker.

Why do some substances float on water?

• they are warmer than water

• they are cooler than water

• they are more dense than water

• they are less dense than water

Answer explanation

Some substances float on water because they are less dense than water.

Which box has a higher density?  

• Box A

• Box B

• cannot be determined

• they are the same

Answer explanation

Box A has a higher density because it contains more mass in the same volume compared to Box B.

A piece of copper has a mass of 89g and a volume of 10 cm3.  What would be the density of the copper?

• 0.89 g/cm3

• 89 g/cm3

• 8.9 g/cm3

• 890 g/cm3

Answer explanation

Density is calculated by dividing the mass by the volume. In this case, the mass is 89g and the volume is 10 cm3. Therefore, the density of the copper is 8.9 g/cm3, which is the correct choice.

Which units of measurement are used for volume?

• grams

• centimeters

• grams/milliliter

• milliliter

Answer explanation

The correct unit of measurement for volume is milliliter.

Define the term "mass".

• Mass/Volume

• Anything that has mass and takes up space 

• The amount of space an object occupies.

• The amount of matter in an object.

Answer explanation

Mass is the amount of matter in an object.

Volume is ...

• Mass/Volume

• The amount of matter in an object.

• The amount of space an object occupies.

• Anything that has mass and occupies space.

Answer explanation

Volume is the amount of space an object occupies.

Jack has a rock. The rock has a mass of 14 g and a volume of 2 cm³. What is the density of the rock?

• 7 mL

• 7 g/cm³

• 28 g/cm³

• 1/7 g/cm³

Answer explanation

Density is calculated by dividing mass by volume. In this case, the mass is 14 g and the volume is 2 cm^3. Therefore, the density of the rock is 7 g/cm^3, which matches the correct answer choice.

Frank has an eraser. It has a mass of 4 g, and a volume of 2 cm³. What is its density?

• 8 g/cm³

• 2 g/cm³

• 1/2 g/cm³

• 24 g/cm³

Answer explanation

Density is calculated by dividing mass by volume. In this case, the mass is 4 g and the volume is 2 cm^3. Therefore, the density is 2 g/cm^3, which is the correct choice.

What is the volume of Object X?

• 10.0 cm³
• 15.0 cm³
• 20.0 cm³
• 25.0 cm³