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Density - Practice Problems

Total questions: 61

Worksheet time: 1hrs 8mins

Name
Class
Date
1.
Look at this image.  Which object has the LOWEST density in water? How? 
a)
The Ping Pong Ball because it floats to the top 
b)
The bolt because it has sunk to the bottom
c)
The soda cap because it is not just full of air like the Ping Pong ball
2.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
3.
Why do the liquids form different layers?
a)
They have different densities.  
b)
They have different masses.  
c)
They have different volumes.  
d)
They are different temperatures.  
4.
If an object has a density of .6 g/mL and you put it into water, will it sink or float?  
a)
sink
b)
float
5.
If an object has a density of 3.6 g/mL and you put it into water, will it sink or float?  
a)
sink
b)
float
6.
Which liquid has the highest density? 
a)
corn syrup
b)
lamp oil
c)
rubbing alcohol
d)
honey
7.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
8.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
9.
What units are used to measure mass?
a)
g
b)
cm3
c)
g/cm3
d)
cm3/g
10.
Archimedes used density to discover if the crown of gold was real because
a)
Substances have their own unique densities
b)
Substances can change densities depending on their size
c)
Substances can change densities depending on their mass
d)
Substances can change densities depending on their volume
11.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
12.
An object with which of the following densities will float on water?
a)
0.7 g/cm3
b)
1.2 g/cm3
c)
3.5 g/cm3
d)
11.4 g/cm3
13.
A student knows the mass of an object. What other variable does the student need to know to calculate the object's density?
a)
Color
b)
Weight
c)
Volume
d)
Length
14.

What is the density of water?

a)

0 g/mL

b)

1 g/mL

c)

10 g/mL

d)

100 g/mL

15.
The following liquids are poured together in a beaker: alcohol (density=0.79), corn syrup (density=1.38), water (density=1.0), and cooking oil (density=0.93).  Which of these liquids will sink to the bottom of the beaker?
a)
alcohol
b)
corn syrup
c)
water
d)
cooking oil
16.
Density is a chemical property of matter.
a)
True
b)
False
17.
All substances have a density that can be measured.
a)
True
b)
False
18.
If two objects have the same volume but one has a greater mass, the one with greater mass 
a)
Has a lower density
b)
 Has a higher density
c)
Will float
d)
Will sink 
19.
In the water displacement method for finding volume
a)
 You subtract the final volume from the initial volume
b)
You subtract the initial volume from the final volume
c)
You add the initial and final volumes
d)
You divide the final volume by 2 
20.
A candle floats in water but sinks in alcohol. This is because 
a)
The candle has less mass in alcohol
b)
The water has less mass than the alcohol
c)
The water is denser than the alcohol
d)
Water and alcohol are both liquids 
21.
A tiny piece of sand is very light but sinks in water. This is because 
a)
 Sand is a solid
b)
Sand is less dense than water 
c)
There is more water than sand
d)
Sand is denser than water 
22.

At STP the density of a given pure substance is always the same.

a)

True

b)

False

23.
The buoyant force opposes the downward pull of gravity on an object. 
a)
True
b)
False
24.
The buoyant force on an object in water is equal to the weight of water that the object displaces. 
a)
True
b)
False
25.
An object made of me is light enough to float in corn syrup, but not in water. What am I? 
a)
Cork 
b)
Diamond
c)
Gold
d)
Rubber
26.
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?
a)
5 ml
b)
16 g
c)
.20 g/ml3
d)
5 g/cm3
27.

What is the formula for density?

a)


 d=mvd=\frac{m}{v}  

b)

 d=vmd=\frac{v}{m}  

c)

 d=m⋅vd=m\cdot v  

d)

 d=m+vd=m+v  

28.

Soy sauce has a mass of 8 grams and a volume of 2 mL. What is its density?

a)

8 g/mL

b)

2 g

c)

4 g/mL

d)

10 g/mL

29.

Salt water has a mass of 15 grams and a volume of 5 mL. What is its density?

a)

20 g/mL

b)

45 g/mL

c)

3 g/mL

d)

10 g/mL

30.

Milk has a volume of 6 mL and a density of 5 g/mL. What is its mass?

a)

1 g/mL

b)

30 g

c)

11 g

d)

33 g/mL

31.

Molasses has a mass of 21 grams and a density of 7 g/mL. What is its volume?

a)

3 mL

b)

28 mL

c)

15 mL

d)

30 g/mL

32.

Corn oil has a volume of 7.5 mL and a density of 2 g/mL. What is its mass?

a)

3.75 g

b)

15 g

c)

0.26 g

d)

9.5 g

33.

If an aluminum cube has a mass of 20 g and each of its sides measure 2 cm, what is its density?

a)

8 cm3

b)

12 g/cm3

c)

2.5 g/cm3

d)

10 g/cm3

34.

If an iron block has a length of 2 cm, a width of 3 cm, and a height of 1 cm, and a mass of 33 g, what is its density?

a)

27 g/cm3

b)

5.5g/cm3

c)

39 g/cm3

d)

6.6 g/cm3

35.
Which box has a higher density?  
a)
Box A
b)
Box B
c)
cannot be determined
d)
they are the same
36.
Calculate the density of the cube.
a)
2 g/cm3
b)
4 g/cm3
c)
6 g/cm3
d)
8 g/cm3
37.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
38.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
39.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
40.
Calculate the density of the cube.
a)
2 g/cm3
b)
4 g/cm3
c)
6 g/cm3
d)
8 g/cm3
41.
If the mass of an unknown substance is 5.3 grams and the volume is 2 cm3. What would be its density? (round)
a)
2.7 g/cm3
b)
2.5 g/cm3
c)
2.4 g/cm3
d)
2.2 g/cm3
42.

What is the density of water at STP (standard Temperature and Pressure)?

a)

0 g/ml

b)

1 g/ml

c)

10 g/ml

d)

100 g/ml

43.

What is the volume of the fish?

a)

18.0 mL

b)

6.0 mL

c)

38.0 mL

d)

32.0 mL

44.
Density is...
a)
the amount of mass in an object
b)
the amount of space an object takes up
c)
the amount of mass in a given space
d)
the weight of an object
45.
What is calculated by multiplying
 l x w x h?
a)
mass
b)
weight
c)
volume
d)
grades
46.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
47.

2- Orange juice has a mass of 18 g and density of 6 g/mL. What is its volume?

a)

6 g/mL

b)

3 mL

c)

18 mL

d)

6 g

48.

Milk has a volume of 6 mL and a density of 5 g/mL. What is its mass?

a)

1 g/mL

b)

30 g

c)

11 g

d)

33 g/mL

49.

Corn oil has a volume of 7.5 mL and a density of 2 g/mL. What is its mass?

a)

3.75 g

b)

15 g

c)

0.26 g

d)

9.5 g

50.

If an iron block has a length of 2 cm, a width of 3 cm, and a height of 1 cm, and a mass of 33 g, what is its density?

a)

27 g/cm3

b)

5.5g/cm3

c)

39 g/cm3

d)

6.6 g/cm3

51.

A 500 gram piece of metal has a volume of 2.75 cm3 . What is its density?

a)

181.8 g/cm3

b)

24 g/cm3

c)

0.0055 g/cm3

52.

A box measures 20 cm x 8 cm x 14 cm and has a mass of 226.8 g. What is the density of the block?

a)

0.101 g/cm3

b)

9.88 g/cm3

c)

5.4 g/cm3

53.

The piece of jewelry occupies a space of 76 mL. If the mass of the piece of jewelry is 122 grams, what is its density?

a)

1.6 g/mL

b)

0.62 g/mL

c)

9272 g/mL

54.

There are 2 containers of pure water. The water in container one has a temperature of 27 degrees, the water in container 2 has a temperature of 67 degrees. What can you state about the density of the water in each container?

a)

Container 1 and 2 have the same density as they are both pure water

b)

Container 1 is more dense as it the temperature of the water is cooler

c)

Container 2 is more dense as it the temperature is warmer

d)

Container 2 is more dense as it the temperature is cooler

55.
In convection, COOL air
a)
Rises
b)
Sinks
56.
In convection, WARM air
a)
Rises
b)
Sinks
57.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
58.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
59.

Which layer of the Earth are convection currents found?

a)

Outer Core

b)

Mantle

c)

Crust

d)

Inner Core

60.

Which is the correct statement?

a)

Oceanic crust is thinner but denser and younger.

b)

Continental Crust is thinner but denser and younger

c)

Oceanic crust is underneath the continental crust.

d)

Continental crust is underneath the oceanic crust.

61.

Which layer has convection currents where the hot, less dense magma rises and the cooler, dense magma sinks?

a)

inner core

b)

outer core

c)

mantle

d)

crust

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