Worked example
A sample has mass 24 g and volume 8 cm³. What is its density?
Answer & why
Answer: 3 g/cm³
Density = 24 ÷ 8 = 3 g/cm³.
Grade 6 · Science
Calculate density from mass and volume
Calculate density with consistent units and distinguish it from total mass.
6 authored questions + worked example
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All questions
All 6 authored questions for this skill.
Question 1
A sample has mass 18 g and volume 9 cm³. What is its density?
- 2 g/cm³
- 3 g/cm³
- 1 g/cm³
- 4 g/cm³
A hint
Density equals mass divided by volume: density = mass ÷ volume.
Answer & why
Answer: 2 g/cm³
Density = 18 ÷ 9 = 2 g/cm³.
Question 2
A sample has mass 35 g and volume 7 cm³. What is its density?
- 3 g/cm³
- 2 g/cm³
- 5 g/cm³
- 1 g/cm³
A hint
Density equals mass divided by volume: density = mass ÷ volume.
Answer & why
Answer: 5 g/cm³
Density = 35 ÷ 7 = 5 g/cm³.
Question 3
A sample has mass 12 g and volume 12 cm³. What is its density?
- 2 g/cm³
- 4 g/cm³
- 1 g/cm³
- 3 g/cm³
A hint
Density equals mass divided by volume: density = mass ÷ volume.
Answer & why
Answer: 1 g/cm³
Density = 12 ÷ 12 = 1 g/cm³.
Question 4
A sample has mass 54 g and volume 9 cm³. What is its density?
- 2 g/cm³
- 3 g/cm³
- 6 g/cm³
- 1 g/cm³
A hint
Density equals mass divided by volume: density = mass ÷ volume.
Answer & why
Answer: 6 g/cm³
Density = 54 ÷ 9 = 6 g/cm³.
Question 5
A sample has mass 24 g and volume 8 cm³. What is its density?
- 3 g/cm³
- 2 g/cm³
- 1 g/cm³
- 4 g/cm³
A hint
Density equals mass divided by volume: density = mass ÷ volume.
Answer & why
Answer: 3 g/cm³
Density = 24 ÷ 8 = 3 g/cm³.
Question 6
A block has mass 40 g and volume 10 cm³. What is its density?
- 1 g/cm³
- 2 g/cm³
- 4 g/cm³
- 3 g/cm³
A hint
Density equals mass divided by volume: density = mass ÷ volume.
Answer & why
Answer: 4 g/cm³
Density = 40 ÷ 10 = 4 g/cm³.