# Density: Question Preview (ID: 21230)

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**You find a piece of metal. It's mass is 5.4 grams. It has a volume of 2 cm3. What is the density? Will it sink or float?**

a) 2.7 g/cm3 ............ it will sink

b) 3.4 g/cm3 ........... it will sink

c) 2.7 g/mL ............ it will float

d) 10.8 g/cm3 ............ it will sink

**You have a rectangular prism made of metal. You measure the length (4 cm), width (3 cm), and height (2 cm). What is the volume of the piece of metal?**

a) 9 cm3

b) 6 cm3

c) 14 cm3

d) 24 cm3

**When a rock is placed in a graduated cylinder, the water level rises from 20 mL to 44 mL. What is the volume of the rock?**

a) 12 mL

b) 20.2 mL

c) 24 cm3

d) 64 cm3

**You have a rectangular prism made of metal. You measure the length, width, and height. What are you able to calculate with these measurements?**

a) mass

b) volume

c) density

d) not enough information given

**You find a rock. It's mass 25 grams. It displaces 5 mL of water when you put in a graduated cylinder. What is the density of the rock? Will it sink of float?**

a) 0.5 g/cm3 .......... it will float

b) 0.5 g/cm3 ........... it will sink

c) 5 g/cm3 ............. it will float

d) 5 g/cm3 ............ it will sink

**If an object has a greater density than water, it will ___________ if placed in water.**

a) float

b) sink

c) can't be determined

d)

**When a rock is placed in a graduated cylinder, the water level rises from 20 mL to 44 mL. What are you able to determine from this information?**

a) the mass of the rock

b) the type of rock

c) the volume of the rock

d) need more information

**If an object has a density less than water, it will ______________ if placed in water.**

a) float

b) sink

c) can't be determined

d)

**The density of fresh water is**

a) 0.8 g/mL

b) 1 g/mL

c) 1.4 g/mL

d) 19.3 g/mL

**Density of liquids is measured in which units?**

a) g/mL

b) mL

c) g/cm3

d) cm3

**Density of solids is measured in which units?**

a) g/mL

b) mL

c) g/cm3

d) cm3

**When measuring volume, 1 cubic centimeter is equal to**

a) the volume of the object.

b) 1 mm

c) 1 mL

d) the mass of the object.

**Density is**

a) the amount of matter in a given mass.

b) the amount of matter in a given volume.

c) can be measured.

d) the amount of atoms in matter.

**To calculate density, you must know the ___________ and __________.**

a) weight and length

b) size and shape

c) weight and volume

d) mass and volume

**What is the volume of a piece of gold that has a length (3 cm), width (3 cm), and height (2 cm)?**

a) 8 cm3

b) 12 cm3

c) 18 cm3

d) 15 cm3

**When you put a rock in a graduated cylinder containing 50 mL of water, the water rises to 82 mL. What is the volume of the rock?**

a) 1.45 mL

b) 32 mL

c) 32 cm3

d) 132 cm3

**What is the density of an object that has a mass of 21 grams and takes up 3 cubic centimeters?**

a) 7 g/cm3

b) 8 g

c) 63 g/cm3

d) 0.7 g/cm3

**The density of a pure substance**

a) changes depending on the size of the object.

b) is always the same.

c) can't be measured accurately.

d) is always greater than the density of water.

**If you cut a piece of wood in half, the density**

a) will increase.

b) will decrease.

c) will stay the same.

d) can't be determined.

**You find a piece of wood floating in a lake. You break the wood into pieces. When you put them back in the water,**

a) the small pieces float and the larger pieces sink.

b) the small pieces sink and the larger pieces float.

c) all of the pieces sink.

d) all of the pieces float.

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