Question detail
A block of metal has a density of 8.5 g/cm³ and a volume of 2 cm³. Calculate the mass of the metal block (Density of materials)
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Changes of state and the particle model
Question
A block of metal has a density of 8.5 g/cm³ and a volume of 2 cm³. Calculate the mass of the metal block (Density of materials)
Answer
The mass of the metal block is 17 g.
Explanation
Exam lens: Write the relationship, substitute values only when needed, and finish by interpreting the result. This question asks: A block of metal has a density of 8.5 g/cm³ and a volume of 2 cm³. Calculate the mass of the metal block (Density of materials). The correct response is The mass of the metal block is 17 g., 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 calculate mass when density and volume are known. 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 35 is distinct because it uses this exact question context and the exam lens rather than a generic particle-model sentence.
Common mistake
Confusing Mass and Density
Students often confuse mass with density, thinking that mass is the same as density when calculating mass from density and volume.
Remind students that mass is measured in kilograms (kg) and density is mass per unit volume. Use the formula mass = density × volume to clarify the distinction.
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