Density & Graphing Review Sheet Answers

Density

1. What is the formula used to calculate density?

D = m V

Density

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

grams

Density

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

cm3

Density

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

mL

Density

2. Give the unit used to measure the following: solid density

g/cm3

Density

2. Give the unit used to measure the following: liquid density

g/mL

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

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 HV = 3cm x 3cm x 3cmV = 27cm3

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 / VD = 54g / 27cm3

D = 2 g/cm3

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 – 10mLV = 2mL 1cm3 = 1mL So… V = 2cm3

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 / VD = 6g / 2cm3

D = 3 g/cm3

Density

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

a. 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

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

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

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

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

Graphing

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

Compares information by counting

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

Graphing

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

Independent

Graphing

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

Dependent

Graphing

4. What 3 things are required on all graphs?

Title, variables with units, data points

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

Graphing

5. a. What type of graph did you make?

Line Graph

Graphing

5. b. What variable is the independent variable?

Time (s)

Graphing

5. c. What variable is the dependent variable?

Distance (m)

Graphing

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

Graphing

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

8m

Graphing

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

Graphing

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

10s