1) What is the correct equation for density? a) Density = mass × volume b) Density = mass ÷ volume c) Density = volume ÷ mass d) Density = mass ÷ weight 2) The unit of density is: a) kg b) m³ c) kg/m³ d) N/m³ 3) A block has a mass of 200 g and a volume of 50 cm³. What is its density? a) 0.25 g/cm³ b) 2 g/cm³ c) 4 g/cm³ d) 10 g/cm³ 4) Which piece of equipment is used to measure the mass of an object? a) Measuring cylinder b) Ruler c) Balance d) Thermometer 5) How is the volume of a regular solid best measured? a) Using a measuring cylinder b) Using displacement c) Using a ruler and calculation d) Using a balance 6) Which formula is used to calculate the volume of a rectangular block? a) length + width + height b) length × width × height c) mass ÷ density d) density × volume 7) Which method is used to find the volume of an irregular solid? a) Ruler method b) Displacement using water c) Weighing method d) Stopwatch method 8) Why should you lower an object gently into the measuring cylinder? a) To prevent water heating b) To avoid splashing water out c) To increase accuracy of mass d) To change the density 9) A stone causes the water level in a measuring cylinder to rise from 40 cm³ to 65 cm³. What is the volume of the stone? a) 25 cm³ b) 40 cm³ c) 65 cm³ d) 105 cm³ 10) Which piece of equipment improves the accuracy of volume measurements? a) Beaker b) Measuring cylinder c) Test tube d) Balance 11) What should you do to reduce error when reading the water level? a) Read from above b) Read from below c) Read at eye level from the bottom of the meniscus d) Shake the cylinder 12) If an object sinks in water, what does this tell you about its density? a) It is less dense than water b) It has no density c) It is the same density as water d) It is more dense than water 13) Why might air bubbles affect the result when measuring volume by displacement? a) They increase mass b) They decrease mass c) They increase measured volume d) They change the density of water 14) A metal cube has a density of 8 g/cm³. What is its mass if the volume is 2 cm³? a) 4 g b) 6 g c) 10 g d) 16 g 15) Which variable is the dependent variable in the density practical? a) Mass b) Volume c) Density d) Shape 16) Which graph is typically plotted in the density practical? a) Density against mass b) Volume against density c) Mass against volume d) Time against mass 17) What does the gradient of a mass–volume graph represent? a) Volume b) Mass c) Density d) Weight 18) Why is water used in the displacement method? a) It has no mass b) It is easy to see c) It flows easily and has a known density d) It changes shape 19) Which safety precaution is most important in this practical? a) Wear gloves b) Wear goggles when using glassware c) Use a heatproof mat d) Turn off electricity 20) Which conclusion is correct if two objects have the same density? a) They have the same mass b) They have the same volume c) They are made of the same material d) They float in water

Density Homework

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