Shanghai Singapore International School Grade 7 General Science 2014/ 2015 Grade 7 Name: Date: Comparing the denisty of liquids. Aim: To measure the density of any two liquid and set them up to see the layers they form Apparatus and materials Measuring cylinders, clean and dry, 2 or more 100ml and 150ml beaker, 1 Measuring balance Choose 2-honey, water, liquid soap coloured in various colours Safety (Give any precautions you may think of in this experiment at the space below) Do not eat or taste the liquids you are using to find the density. Photo/s Procedure (The procedure is similar to the Density experiment you did in class. Use this procedure or type out your own) 1. Decide on liquids to use (In my group, we used water and soap - milk, coloured blue water, honey and pink soap). 2. Measure the mass of the measuring cylinder. 3. Pour liquid into measuring cylinder and measure the mass of the combined measuring cylinder and liquid. 4. Pour liquid into beaker. 5. Wash the measuring cylinder carefully and remove any remaining liquids on the measuring cylinder. 6. Repeat steps 3-4 for the other liquid (soap) Shanghai Singapore International School Grade 7 General Science 2014/ 2015 7. Note down each mass of liquid and calculate the density of the liquid. 8. Write and note down each observation and the masses and densities of liquids. 9. Clean up after experiment and procedures are completed. Data and calculations Water- 32.543-22.575=9.968g 9.968/10=0.9968g/cm3 Soap- 33.018-22.575=10.443g 10.443/10=1.0443g/cm3 Conclusion – The soap liquid is dencer then water liquid because the soap in under the water at the bottom of the beaker and the water is above the soap. It is divided into two parts. The soap’s particles are more spread out and in the water liquid, the particles are closer to each particles.