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**Density & Graphing Review Sheet Answers**

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Density 1. What is the formula used to calculate density? D = m V

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Density 2. Give the unit used to measure the following: mass grams

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Density 2. Give the unit used to measure the following: solid volume cm3

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Density 2. Give the unit used to measure the following: liquid volume mL

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Density 2. Give the unit used to measure the following: solid density g/cm3

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Density 2. Give the unit used to measure the following: liquid density g/mL

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Density 3. What is the density of a substance that has a volume of 12mL and a mass of 36g? D = m/V D = 36g / 12mL D = 3g/mL

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Density 4. A cube is 3cm on each side and has a mass of 54 grams. a. What is the volume of the cube? V = L x W x H V = 3cm x 3cm x 3cm V = 27cm3

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Density 4. A cube is 3cm on each side and has a mass of 54 grams. a. What is the density of the cube? D = m / V D = 54g / 27cm3 D = 2 g/cm3

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Density 5. A marble is lowered into a graduated cylinder holding 10mL of water. After the marble is added, the water level line rises to 12 mL. The marble has a mass of 6g. a. What is the volume of the marble? V= 12mL – 10mL V = 2mL 1cm3 = 1mL So… V = 2cm3

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Density 5. A marble is lowered into a graduated cylinder holding 10mL of water. After the marble is added, the water level line rises to 12 mL. The marble has a mass of 6g. a. What is the density of the marble? D = m / V D = 6g / 2cm3 D = 3 g/cm3

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**Density 6. Use the following chart to answer questions a-d.**

Which substance is the least dense? Rubbing Alcohol SUBSTANCE DENSITY Ice 0.98 g/cm3 Water 1.00 g/mL Rubbing Alcohol 0.85 g/mL

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Density 6. Use the following chart to answer questions a-d. b. Which substance is the most dense? Water SUBSTANCE DENSITY Ice 0.98 g/cm3 Water 1.00 g/mL Rubbing Alcohol 0.85 g/mL

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Density 6. Use the following chart to answer questions a-d. c. Would ice sink or float in water? Float because ice is less dense SUBSTANCE DENSITY Ice 0.98 g/cm3 Water 1.00 g/mL Rubbing Alcohol 0.85 g/mL

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Density 6. Use the following chart to answer questions a-d. d. Would ice sink or float in rubbing alcohol? Sink because ice is more dense SUBSTANCE DENSITY Ice 0.98 g/cm3 Water 1.00 g/mL Rubbing Alcohol 0.85 g/mL

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Graphing 1. Explain what type of information each of the following graphs would be used to represent: a. line graph Shows trends in how data changes over time

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Graphing 1. Explain what type of information each of the following graphs would be used to represent: b. bar graph Compares information by counting

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Graphing 1. Explain what type of information each of the following graphs would be used to represent: c. circle graph (pie chart) Shows the parts of a whole

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Graphing 2. The ______________ variable is located on the X-axis. Independent

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Graphing 3. The ______________ variable is located on the Y-axis. Dependent

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Graphing 4. What 3 things are required on all graphs? Title, variables with units, data points

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Graphing 5. Graph the following data and answer the questions below. Graph time on the X-axis and distance traveled on the Y-axis. DISTANCE (m) TIME (s) 4 m 2 s 6 m 3 s 9 m 4.5 s 12 m 6 s 15 m 7.5 s 18 m 9 s

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Graphing 5. a. What type of graph did you make? Line Graph

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Graphing 5. b. What variable is the independent variable? Time (s)

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Graphing 5. c. What variable is the dependent variable? Distance (m)

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Graphing 5. d. What is the distance traveled at 4s?

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Graphing 5. d. What is the distance traveled at 4s? 8m

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Graphing 5. e. How long do you predict it would take to go 20 meters?

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Graphing 5. e. How long do you predict it would take to go 20 meters? 10s

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