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WorksheetsPure Substance and Mixtures
Total questions: 50
Worksheet time: 4hrs 9mins
Name
Class
Date
1.
Compounds are pure substances made from two or more elements chemically combined. What is the name of the illustration that shows all the known elements?
a)
element table
b)
periodic table
c)
star chart
d)
solar system model
2.
Water is a neutral compound. Based on the pH scale, what is the pH of water?
a)
0
b)
7
c)
10
d)
14
3.
A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile.
Which of these statements best describes the contents of the pile?
Which of these statements best describes the contents of the pile?
a)
It is a heterogeneous mixture of iron and sulfur that can be separated by magnetism.
b)
It is a solution of iron and sulfur that can be separated by magnetism.
c)
It is a compound of iron and sulfur that can be separated by magnetism.
d)
It is a suspension of sulfur in iron that can be separated by magnetism.
4.
Of these mixtures, which one is a solution?
a)
A
b)
B
c)
C
d)
D
5.
In this picture, which represents atoms?
a)
A
b)
B
c)
C
6.
In this picture, how would you best label or describe A and B?
a)
products
b)
elements
c)
reactants
d)
producers
7.
In this picture, which one represents a compound?
a)
A
b)
B
c)
C
8.
Of these mixtures, which one is a suspension?
a)
A
b)
B
c)
C
9.
Some compounds are classified as acids or bases. The pH scale shows how acidic or how basic these compounds are. The lower the pH, the more acidic a compound is. The higher the pH, the more basic it is. Sodium hydroxide, a compound commonly found in drain cleaners, has a pH of 13.
a)
highly basic
b)
highly acidic
c)
slightly basic
d)
slightly acidic
10.
In this picture, which represents an element?
a)
A
b)
B
c)
C
11.
Which of these common substances is a homogeneous mixture?
a)
table salt
b)
whole milk
c)
pure water
d)
maple syrup
12.
What type of substance is always made up of a single type of atom?
a)
compound
b)
mixture
c)
molecule
d)
element
13.
How could you break down the compound calcium carbonate into the elements that make it up?
a)
by melting
b)
by crushing
c)
with a filter
d)
with chemical changes
14.
Which of these substances is a compound?
a)
chlorine
b)
nitrogen
c)
uranium
d)
ammonia
15.
Muddy water is an example of what type of mixture?
a)
colloid
b)
solution
c)
suspension
d)
homogeneous
16.
Which of these substances is an example of a solution?
a)
milk
b)
brass
c)
mercury
d)
concrete
17.
Which is the best set of tools to use for separating a mixture of water, sugar, and pebbles?
a)
a filter and a magnet
b)
a filter and a hot plate
c)
a magnet and a hot plate
d)
a settling tank and a filter
18.
What is a homogeneous mixture?
a)
a mixture that is the same throughout.
b)
a mixture that is made up of one type of atom.
c)
a mixture that is made up of one type of compound
d)
a mixture that cannot be separated through physical changes
19.
An example of a compound would be:
a)
hydrogen gas (H2)
b)
heterogeneous
c)
sodium chloride (NaCl)
d)
oxygen gas (O2)
20.
You are eating a pizza. What type of mixture are you consuming?
a)
homogeneous
b)
heterogeneous
c)
pure substance
d)
The Periodic Table
21.
Formed when atoms are joined together by a chemical bond.
a)
mixture
b)
molecules
c)
electron cloud
22.
DIFFERENT kinds of atoms chemically combined to form a substance are
a)
Mixture
b)
Element
c)
Compound
d)
Substance
23.
A combination of particles of one or more substance that are distributed uniformly throughout another substance is a/an
a)
mixture
b)
pure substance
c)
solution
d)
elements
24.
CaCl2
a)
Pure Substance & Element
b)
Pure Substance & Compound
c)
Mixture & Homogenous
d)
Mixture & Heterogenous
25.
Carbon
a)
Pure Substance & Element
b)
Pure Substance & Compound
c)
Mixture & Homogenous
d)
Mixture & Heterogenous
26.
Carbon dioxide
a)
Pure Substance & Element
b)
Pure Substance & Compound
c)
Mixture & Homogenous
d)
Mixture & Heterogenous
27.
Chocolate chip cookie
a)
Pure Substance & Element
b)
Pure Substance & Compound
c)
Mixture & Homogenous
d)
Mixture & Heterogenous
28.
This is a heterogeneous mixture in which particles settle out unless it is constantly stirred.
a)
colloid
b)
suspension
c)
solution
d)
alloy
29.
This is a type of heterogeneous mixture in which the particles are dispersed and do not settle out.
a)
alloy
b)
solution
c)
suspension
d)
colloid
30.
What is an example of a mixture?
a)
iron
b)
ice
c)
soil
d)
gold
31.
Salt is a(n)
a)
element
b)
compound
c)
mixture
32.
Salt and pepper are a(n)
a)
element
b)
compound
c)
mixture
33.
This contains a variety elements and compounds that ARE NOT chemically combined.
a)
Water
b)
Mixture
c)
Elements
d)
Compounds
34.
Alex goes into the garden and digs up a shovel full of dirt. This is a _____________ mixture.
a)
Homogeneous
b)
Heterogenous
35.
Can a mixture be separated?
a)
No
b)
Yes
c)
Only sometimes
36.
What is a compound?
a)
the simplest form of a substance
b)
a combination only of 3 elements
c)
a combination of 2 or more elements
d)
a place where people are held
37.
What is a mixture?
a)
a combination of elements to make a new substance
b)
a chemically combined substance
c)
a combination of substances where new substances are formed through a reaction
d)
a combination of substances in which the atoms of the substance do not chemically combine
38.
Pepsi is a . . .
a)
Heterogeneous mixture
b)
homogeneous mixture
c)
Element
d)
Compound
39.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
40.
Which of the following is a mixture?
a)
Sugar
b)
Salt Water
c)
Water
d)
Oxygen
41.
Which of the following is a compound?
a)
Sugar
b)
Salt Water
c)
Salad Dressing
d)
Oxygen
42.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
43.
This is made up of one or more of the SAME kind of atom
a)
Element
b)
Mixture
c)
Compound
d)
Matter
44.
Liquids that are combined together and maintain their physical properties are labeled as a
a)
solute
b)
mixture
c)
solvent
d)
compound
45.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
46.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
47.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
48.
The picture shown here is what type of mixture?
a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
element
49.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
50.
What does this picture represent?
a)
element
b)
compound
c)
mixture
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