Density Quiz
Questions: 16 · 10 minutes
1. Two solid blocks have equal volumes. Block A has twice the mass of Block B. How do their densities compare?
Block A is twice as dense as Block B
Block B is twice as dense as Block A
They have equal densities because their volumes match
Their densities cannot be compared without knowing their shapes
2. A sealed gas sample is compressed to a smaller volume while its mass remains constant. What happens to its density?
It decreases because the gas occupies less space
It remains constant because the mass is unchanged
It increases because the same mass occupies less volume
It becomes equal to the density of the container
3. A solid is heated and expands while losing no mass. What happens to its density?
It increases because its particles move faster
It remains constant because its mass is unchanged
It decreases because the same mass occupies more volume
It becomes equal to the density of the surrounding air
4. An object with an average density of 0.80 g/cm³ floats freely in water with a density of 1.00 g/cm³. Approximately what fraction of the object's volume is submerged?
80%
50%
100%
20%
5. Which conversion is correct?
1 g/cm³ = 1 kg/m³
1 g/cm³ = 10 kg/m³
1 g/cm³ = 100 kg/m³
1 g/cm³ = 1,000 kg/m³
6. How can you determine the volume of a small, irregular, nonporous stone that sinks in water?
Divide its mass by the mass of the water
Submerge it and measure the increase in water volume
Multiply its mass by the density of water
Measure its longest dimension and cube that value
7. A sample has a mass of 120 g and a volume of 40 cm³. What is its density?
4,800 g/cm³
0.33 g/cm³
80 g/cm³
3 g/cm³
8. Sample A has a mass of 90 g and a volume of 30 cm³. Sample B has a mass of 140 g and a volume of 70 cm³. Which comparison is correct?
The samples have equal densities
Sample B is denser than Sample A
Sample A is denser than Sample B
The comparison is impossible because their masses differ
9. A solid object floats at rest with part of it above a liquid's surface. Ignoring surface-tension effects, what can you infer?
The object and liquid have equal average densities
The object has greater average density than the liquid
The object's density must be zero
The object has lower average density than the liquid
10. What is the SI unit of density?
Grams per cubic centimetre (g/cm³)
Kilograms per litre (kg/L)
Kilograms per cubic metre (kg/m³)
Grams per millilitre (g/mL)
11. A metal object has a mass of 270 g and raises the water level in a graduated cylinder from 50 mL to 80 mL. What is its average density?
9 g/mL
3.4 g/mL
5.4 g/mL
30 g/mL
12. A material has a density of 4 g/cm³. What volume is occupied by a 200 g sample?
800 cm³
50 cm³
196 cm³
0.02 cm³
13. Several immiscible liquids settle into stable horizontal layers in a container. Where is the liquid with the greatest density?
At the top of the container
At the bottom of the container
In the layer with the greatest visible volume
Always in the middle layer
14. A student calculates density using an accurate mass but records a volume smaller than the true volume. How will the calculated density compare with the true density?
It will be too high
It will be unchanged
It will be too low
It will necessarily be zero
15. Which equation correctly defines density?
Divide volume by mass
Add mass and volume
Multiply mass by volume
Divide mass by volume
16. A uniform material sample is cut exactly in half. How does the density of either half compare with the original sample?
It is half the original density
It is the same as the original density
It is twice the original density
It depends only on which half is measured first