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Partial Summative AssessmentUnit 2: Density, Mass and VolumeStudent’s name:Ricardo IturriagaSection:6EDate:Jan, 16, 2018Directions: Answer the questions below. You may use words and/or diagrams to help you show your understanding.If two substances have the same volume, but the first one has greater mass, which one will have the greater density? Explain how you knowThe one with more mass because the mass means how much they weight so if a liquid has more mass or weighs more than another liquid it means it has more density.Will different volumes of water always have the same density? Why or why not?Yes because each type of liquid no matter the amount of liquid is in a container it will have the same density because it’s water and water has a specific density and it can’t be changed no matter how much water you put.Explain how to find the volume of an irregular solid, like a star, a toy soldier, a marble or a pencil.You need a graduated cylinder that has measures with mililiters. Then you put water to a measure that you remember then you put the object in and it sinks and the amount of mililiters that went up is the volume of that object.Look at the drawings below and think about the size, mass, or arrangement of water molecules compared to the molecules of wax. Why does a candle float on water?A candle floats in water because it’s molecules have little gaps of air because the molecules are not all closed togheter so that air needs to get out of the water so that air in the candle makes the candle float and with the water it has the molecules very tight togheter.a) Which of the following materials will float on water (density 1 g/cm3)? Circle them or highlight them. corn oil = 0.93 g/cm3                                           glycerine = 1.26 g/cm3 Wood corn syrup = 1.38 g/cm3       Ice wood = 0.85 g/cm3       Corn oil steel = 7.81 g/cm3       glycerine rubber = 1.34 g/cm3      Rubber ice = 0.92 g/cm3 corn syrup steelb) Assuming the materials don’t mix, show how the materials would “stack up” in the container to the right? Write the name of the material in the line inside the container. Directions: Answer the following problems. Use the Density triangle to help you and follow the example that will be answered on the board. Example:A screwdriver has the density of 5.5 grams per cubic centimeter.  It also has the mass of 2.3 grams. What is the screwdriver’s volume?What version of the formula will you use?I will use density divided by  mass is equal to volumeSubstitute the letters for the valuesSpace of operationsFinal answer (with units/labels)A block of wood measures 3cm x 6cm x 2cm and has a mass of 10g.  Calculate the density of this object.What version of the formula will you use?Substitute the letters for the valuesSpace of operationsFinal answer (with units/labels)Calculate the mass of an object that has a volume of 12 cm3 and a density of 3.2 g/cm3.What version of the formula will you use?Substitute the letters for the valuesSpace of operationsFinal answer (with units/labels)Calculate the volume of an object that has a mass of 5.6 g and a density of 3.1 g/cm3. What version of the formula will you use?Substitute the letters for the valuesSpace of operationsFinal answer (with units/labels)You have a graduated cylinder with 20 mL of water in it.  You add 250 g of lead weights, and the volume of water rises to 42mL.  What is the density of the lead?What version of the formula will you use?Substitute the letters for the valuesSpace of operationsFinal answer (with units/labels)The density of a solid is 0.89 g/cm3.  If the mass of the object is 105g, determine the volume.What version of the formula will you use?Substitute the letters for the valuesSpace of operationsFinal answer (with units/labels)

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