Name: _______________________________________________ Physics Density worksheet Date: Page 1 of 12 Questions Q1.A student measures the density of water. She uses a measuring cylinder and an electronic balance. (a) State the equation linking density, mass and volume. (1) (b) A correct unit for density is (1) A g/cm B kg/cm C g/cm2 D g/cm3 (c) Complete the table to show what is measured by an electronic balance. (1) (d) Describe how the student should use each instrument to make her measurements as accurate as possible. (4) Measuring cylinder.................................................................................................................................. .............................................................................................................................................................. ....................................................................................................................................................... .............................................................................................................................................. Page 2 of 12 .............................................................................................................................................. Electronic balance.......................................................................................................................... .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. (e) The student wants to make sure her experiment is a fair test. (i) State one factor that she should keep the same throughout her experiment. (1) .............................................................................................................................................. (ii) Why is it important that she keeps this factor constant? (1) .............................................................................................................................................. .............................................................................................................................................. (Total for question = 9 marks) Q2.A student investigates the density of a liquid. The student uses scales that show mass to the nearest gram.The student uses a measuring cylinder that is marked with volume in cm3.First the student puts an empty measuring cylinder on the scales. Then the student puts some liquid into the measuring cylinder. Page 3 of 12 Then the student looks at the level of liquid in the measuring cylinder. (a) Complete the results table for this investigation by transferring the information given opposite. (6) (b) Show how the student should use these results to calculate the density of the liquid. (2) (c) Suggest two ways in which the student could improve the investigation to give a more accurate value for the density. (2) 1 ..................................................................................................................................................................... .............................................................................................................................................. .............................................................................................................................................. 2 ..................................................................................................................................................................... .............................................................................................................................................. .............................................................................................................................................. (Total for question = 10 marks) Page 4 of 12 Q3. (a) Who is correct − Kalpana or Christine? (2) .............................................................................................................................................. Explain your answer. .............................................................................................................................................. .............................................................................................................................................. (b) Kalpana uses a measuring cylinder to find the volume of water displaced by the stone. She has three measuring cylinders to choose from. Page 5 of 12 (i) Which measuring cylinder would give the most precise measurement? Explain your answer. (2) .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. (ii) The most precise measuring cylinder may not give an accurate reading. Suggest why. (1) .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. (c) The table shows the measurements that Kalpana makes. (i) State the equation linking density, mass and volume. (1) (ii) Calculate the density of the stone. State your answer to an appropriate number of significant figures. Give the unit. (3) Density = ........................................................... Unit ........................................................... (d) (i) How can Kalpana use her value of density to identify the type of stone? (2) .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. (ii) Kalpana may still be unsure about the type of stone.Suggest why. (1) .............................................................................................................................................. Page 6 of 12 .............................................................................................................................................. (Total for question = 12 marks) Q4. Marbles is a game played with small balls of coloured glass. Each ball is known as a marble. (a) Describe how a millimetre scale and two set squares can be used to measure the diameter of a marble. You may draw a diagram to help your answer. (3) ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (b) Describe an experiment to find the density of a marble. You may draw a diagram to help your answer. (5) Page 7 of 12 ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (Total for question = 8 marks) Q5.The volume of a piece of brass is 16.3 cm3. A student measures its mass using an electronic balance. The mass of the brass is 138 g. (a) (i) State the equation linking density, mass and volume. (1) (ii) Calculate the density of brass. Give the unit. (3) Page 8 of 12 density = ........................................................... (b) The student notices that the electronic balance has a zero error, so it shows mass readings that are all slightly too small. This means that the density value is (1) A incorrect and slightly too large B incorrect and slightly too small C correct because the student used three significant figures D correct because the mass of the block is more than zero (Total for question = 5 marks) Q6.The photograph shows some large concrete cubes. The mass of one of the concrete cubes is 1000 kg. (a) State the weight of this concrete cube. Give the unit. (2) weight of concrete cube = ....................... unit ........... (b) The density of this concrete cube is 2300 kg/m3. (i) State the equation linking density, mass and volume. (1) (ii) Calculate the volume of this concrete cube. (2) volume of concrete cube = ........................................ m3 Page 9 of 12 (c) The graph shows the volumes of 1000 kg of some other materials. (i) State the type of graph shown. (1) ............................................................................................................................................. (ii) Give a reason why a line graph is not an appropriate way to display this data. (1) ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (iii) Use information from the graph to compare the densities of cork and water. (2) ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (Total for question = 9 marks) Q7.A student has a small piece of steel. Describe an experiment that he could do to find the density of steel. You may draw a diagram to help your answer. (5) Page 10 of 12 ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (Total for question = 5 marks) Q8.The object shown in the photograph is an old, brass mass.It is marked 500 g. (a) A student puts the mass on an electronic balance. The electronic balance reading is 498.2 g. The student concludes: Evaluate this conclusion. (2) .............................................................................................................................................. .............................................................................................................................................. Page 11 of 12 .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. (b) The student wants to find the density of the old, brass mass. First he obtains a correct value for the mass.What else must he do to find the density? (3) .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. .............................................................................................................................................. (Total for question = 5 marks) Page 12 of 12
