Density and Buoyancy Star Review Name______

What is the equation for density? (p.24) / What are the units used for density? (p.24)
1. 2.
How does the density of an object change when it is cut into pieces? (p.25) / How do you measure the volume of a cube? (p. 23)
How do you measure the volume of an irregularly shaped stone? (p.23)
Regular Solids:
Density = mass / LxWxH / Irregular Solids:
Density = mass / water displaced / Liquids:
Density = mass / mL
Length = 6cm Width = 3cm Height = 1cm Mass of object = 36g
Show work and units.
Find the density: / Initial water level = 25 mL Mass of object =8 g
Final water level with object = 29 mL
Show work and units.
Find the density: / Volume of Liquid = 100 mL
Mass of Liquid = 25 g
Show work and units.
Find the density:
A rectangular prism measures 2 cm by 4 cm by 6 cm. It has a mass of 120 grams. What is its density? (p.24) Show work and units. / A graduated cylinder reads 5 mL. After an object is placed in it, it reads 10 mL. If the object has a mass of 40 g, what is its density?Show work and units. / A 20.0 g marble displaces 5.0 mL of water. What is its density? (p.24)
Show work and units.
A sample of sulfur has a mass of 12 g and a volume of 6.0 cm3. What is the density of sulfur? (p.24)Show work and units. / / Find the volume of the liquid in the graduated cylinder. If this liquid has a mass of 96 grams, what is its density? (p.22)Show work and units. / An object has a mass of 50 grams. It has a density of 10 g/cm3. What is the volume of the object? (p. 24) Show work and units.
What is the density of water? (p.425) / What must be the density of something that sinks in water? (p.425) / What must be the density of something that floats in water? (p.425)
Define Buoyant Force. (p.427) / The buoyant force on an object is ______to the weight of the fluid displaced by the object.(p.428)
If the buoyant force is less than the weight of an object what will happen? (p. 427) / If the buoyant force is more than the weight of an object what will happen? (pg. 427)
An object weighs 5 Newtons. In water, it feels like it weighs 3 Newtons. This means the buoyant force is 2 Newtons (5-3 = 2). When the object is placed in the water, it displaces water. This amount of water weighs ______. (p.428) / A bucket contains water that spilled out of a barrel when an eighth grader was placed in it. The weight of the water is 75 kg. The buoyant force acting up on the student is ______, because Buoyant Force = Weight of Displaced Fluid (p. 428)
If an object is more dense than a liquid, it will______. Draw a coin where it would be located in water if it’s density was 6.0 g/cm3. Label the forces. Circle the force that is greater. (p.427)

/ If an object is the same density of the liquid, it will ______. Draw a coin where it would be located in the water if it’s density was 1.0 g/cm3. Label the forces. Compare the strength of the forces. (p.427)
/ If an object is less dense than a liquid, it will ______. Draw a coin where it would be locatedin the water if it’s density was 0.8 g/cm3. Label the forces. Circle the force that is greater. (p.427)


If you put the following items in a graduated cylinder, what order would they settle from bottom to top?
Wood = 0.85 g/cm3 , Rubber = 1.34 g/cm3 , Steel = 7.81 g/cm3, Liquid Soap = 1.26 g/cm3 Corn oil= 0.93 g/cm3 Corn syrup = 1.38 g/cm3
(p.425) / Top / Honey has a density of 1.36 g/mL.
Circle the items to the right that will float in honey. (p. 425) / Copper Wire / 8.8 g/mL
Rubber Washer / 1.34 g/mL
Plastic / 0.93 g/mL
Wood / 0.7 g/mL
Tar Ball / 1.02 g/mL
Bottom / Corn Syrup / 1.38 g/mL