Question detail
What is the formula for calculating density?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Changes of state and the particle model
Question
- A. Density = mass divided by volume
- B. Density = volume divided by mass
- C. Density = mass times volume
- D. Density = mass plus volume
Answer
The correct answer is Density = mass divided by volume.
Explanation
Unit lens: Check the units before giving the final statement so the physics quantity is not swapped. This question asks: What is the formula for calculating density. The correct response is Density = mass divided by volume, because density links mass and volume, so the answer must preserve which quantity is being calculated. In Density of materials, the marking point should connect directly to recall and apply the equation density = mass divided by volume. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Changes of state and the particle model, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 13 is distinct because it uses this exact question context and the unit lens rather than a generic particle-model sentence.
Common mistake
Common Mistake in Density Calculation
Students often confuse mass and volume when applying the density equation, leading to incorrect calculations.
Always ensure you are using the correct values for mass (in kg or g) and volume (in m³ or cm³) before substituting them into the density equation.
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