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Classification of Matter

Total questions: 80

Worksheet time: 1hrs 24mins

Name
Class
Date
1.

Two boxes in the image represent an element. Circle those two boxes.

2.

In our life, we work almost exclusively with compounds. But a few objects are elements, such as iron. The biggest reason for this is elements tend to combine to form compounds. If the name is on the Periodic Table in one single box, it is an element. For example, Aluminum (Al) is an element while Table Salt (NaCl) is a compound. Scarlett and Ava were discussing this in their chemistry class. Which of the following is an element?

H20 (water), Calcium (Ca), or CO2 (Carbon Dioxide)

(a)  

3.

One box in the image represents a compound. Circle that box.

4.

Hannah is conducting an experiment in her chemistry class. She has a sample of Silver (Ag). Is this sample an Element, Compound, or Mixture?

a)

Element

b)

Compound

c)

Mixture

5.

Element, Compound or Mixture?

Nora is conducting an experiment in her chemistry class. She has a sample of Oxygen (O). What type of substance is it?

a)

Element

b)

Compound

c)

Mixture

6.

Element, Compound or Mixture?

Benjamin is making a saltwater solution for his science experiment. What is saltwater?

a)

Element

b)

Compound

c)

Mixture

7.

Daniel, Ethan, and Henry are in a science lab. Which jar contains a compound?

a)

1st jar

b)

2nd jar

c)

3rd jar

d)

4th jar

8.

Aiden and Jackson are discussing the elements they learned about in science class. Select the two elements from the list below.

a)

Oxygen

b)

Carbon Dioxide

c)

Nitrogen

d)

Water

9.

Olivia and Benjamin are in a science class. Select the two compounds they discussed.

a)

Oxygen

b)

Carbon Dioxide

c)

Nitrogen

d)

Water

10.

Grace is analyzing a chemical compound in her lab. How many different elements make-up the compound shown?

a)

2

b)

3

c)

6

d)

7

11.

Luna, Aria, and Isla are sorting different substances in their science class. They need to classify each substance as either an element, a compound, or a mixture. Can you help them?

a)

Elements

b)

Compounds

c)

Mixtures

12.

Abigail, Aiden, and Samuel are sorting different substances in their science class. Are they dealing with Elements, Compounds, or Mixtures?

a)

Elements

b)

Compounds

c)

Mixtures

13.

Rohan and Abigail are sorting different substances in their chemistry lab. They need to classify each substance as an element, compound, or mixture. How should they classify water?

a)

Elements

b)

Compounds

c)

Mixtures

14.

Identify the element.

a)

A

b)

B

c)

C

d)

D

e)

E

15.

Ava and Nora are in a chemistry lab. They need to identify a compound from a set of samples. Identify the compound.

a)

A

b)

B

c)

C

d)

D

e)

E

16.

Identify the mixtures in the following list of substances that William, Noah, and Jackson found in the lab.

a)

A

b)

B

c)

C

d)

D

e)

E

17.
a)
Element
b)
Compound
c)
Mixture
18.
a)
Element
b)
Compound
c)
Mixture
19.

Match the term with the correct definition:​

a)

Element

1.

A pure substance

b)

Compound

2.

2 substances are chemical combined

c)

Mixture

3.

2 substances are physically combined

20.

Match the following term with the correct picture

a)

1.

Element

b)

2.

Compound

c)

3.

Mixture

21.

1 Liam and Grace are working on a science project. They discover a substance made up of two or more chemically combined elements. This substance is —

a)

an element

b)

mixture

c)

compound

d)

solution

22.

Noah and Grace are studying different substances in their chemistry class. They learned that some substances contain only one kind of atom.  Which of the following substances are they referring to?

a)

element 

b)

compound 

c)

mixture 

d)

water 

23.

Ava and Elijah discovered that a molecule is made of ________ atoms. 

a)

big 

b)

similar 

c)

different 

24.

Abigail and Samuel are conducting an experiment in their chemistry class. They observe that DIFFERENT kinds of atoms chemically combine to form a pure substance called

a)

Mixture

b)

Element

c)

Compound

d)

Substance

25.

Mia and Mason are working on a science project. They need to identify a substance that contains a variety of elements and compounds that ARE NOT chemically combined. What is this substance?

a)

Water

b)

Mixture

c)

Elements

d)

Compounds

26.

Lily and Rohan are discussing chemistry. Lily says that a pure substance...

a)

is an element or a compound

b)

is an element or a mixture

c)

is a compound or a mixture

d)

is a mixture

27.

Elijah and Ava are looking at a picture of a substance in their chemistry class. This picture represents which of the following?

a)

element

b)

compound

c)

mixture of elements

d)

mixture of compounds

28.

When Ethan and Charlotte mix different colored sand together, the sand keeps its original colors. 

a)

True

b)

False

29.

Anika and James are conducting an experiment with different colored balls representing atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

30.

During a science class, Charlotte and Noah were discussing why oxygen is classified as a pure substance and air is classified as a mixture. Which statement identifies the reason?

a)

Oxygen is more reactive than air.

b)

Oxygen has a higher density than air.

c)

Oxygen goes under a phase change, whereas air is always a gas.

d)

Oxygen contains only one substance, but air contains several substances.

31.

Aiden and Sophia are looking at a diagram in their chemistry class. 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

32.

Emma and Harper are conducting an experiment in their chemistry class. They have a diagram that represents a _____.

a)

pure substance that is a compound

b)

mixture of elements

c)

pure substance that is an element

d)

mixture of compounds

33.

During a science class, Evelyn and Priya were discussing substances. Which of the following is represented by a chemical symbol on the Periodic Table?

a)

Element

b)

Compound

c)

Mixture

d)

Impure substance

34.

Aiden and Mason are discussing substances in their chemistry class. Which of the following is represented by a chemical formula?

a)

Element

b)

Compound

c)

Mixture

35.

Scarlett and Avery are making a salad with different vegetables. A combination of different substances that can be easily (physically) separated is

a)

element

b)

compound

c)

mixture

d)

pure substance

36.

Mia and Noah are mixing different substances in their science class. They notice that one mixture appears to be evenly mixed throughout. What type of mixture is this?

a)

an atom

b)

a compound

c)

a homogeneous mixture

d)

a heterogeneous mixture

37.

Ava and Jackson mixed sand and salt together. What did they form?

a)

a compoud

b)

an acid

c)

an element

d)

a mixture

38.

Maya and Benjamin are discussing chemistry. Maya asks, "Which of the following is a way in which elements and compounds are similar?"

a)

Elements and compounds are pure substances.

b)

Elements and compounds are both made up of different kinds of atoms.

c)

Elements and compounds can both be broken down by physical means.

d)

Elements and compounds are listed on the periodic table.

39.

Mia and Maya are discussing what the air is made of. The air is a _________. 

a)

element 

b)

mixture 

c)

compound 

d)

energy 

40.

Aiden is making a fruit salad. What is the best way to describe the salad?

a)

element

b)

compound

c)

mixture

41.

Michael and Sophia are in a chemistry lab. They are given a sample and asked to classify it. How should they label the sample?

a)

Element

b)

Compound

c)

Mixture of Elements

d)

Mixture of Compounds

42.

Rohan and Jackson are in a chemistry lab. They are given a sample and asked to classify it. Classify the sample with the correct label.

a)

Compounds

b)

Mixture of Elements

c)

Mixture of Compounds

d)

Mixture of Elements & Compounds

43.

Rohan and Lily are conducting an experiment in their science class. They are mixing different substances and observing their properties. They notice that some mixtures are not the same throughout. 

a)

homogeneous mixtures 

b)

heterogeneous mixtures 

c)

solutions 

d)

water 

44.

Nora and Michael are conducting an experiment in their science class. They need to separate a mixture of sand and salt. Mixtures are separated through ___________changes.

a)

mixture

b)

compound

c)

physical

45.

Abigail and Ethan are making a salad. What is a mixture?

a)

a pure substance that is made from a single type of atom.

b)

a substance that consists of 118 Elements total.

c)

when 2 or more elements chemically combine

d)

when 2 or more substances physically combine

46.

Aria and Mason are discussing which of the following are elements

a)

hydrogen

b)

helium

c)

carbon dioxide

d)

oxygen

e)

air

47.

Daniel and Grace are discussing which of the following are mixtures. Can you help them identify?

a)

blood

b)

copper

c)

Kool-aid

d)

Chex Mix

e)

helium

48.

Abigail is conducting a chemistry experiment and needs to know: How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

49.

Hannah is conducting a chemistry experiment and needs to identify the correct formula for a compound containing:
 three hydrogen (H)
one sulfur (S)
four oxygen (O). Which is the correct formula?

a)

H3SO4

b)

HSO4

c)

H4S3O

d)

H2O

50.

In Avery's chemistry class, the blue numbers in the chemical equation represent ________

a)

I don't know, and don't want to try

b)

coefficients

c)

subscripts

d)

none of the answers are correct

51.

Aria and Rohan are building molecular models in their chemistry class.
Black = Carbon (C)
White = Hydrogen (H)
What would be the formula for ethane?

a)

CH4

b)

CH6

c)

C2H2

d)

C2H6

52.

Michael and Aria are working on a gardening project. They need to identify what potting soil is an example of. Potting soil is an example of a(n)

a)

mixture

b)

solute

c)

compound

53.

Charlotte and Aiden are sorting items in their science class. Which list only contains mixtures?

a)

carbon, sulfur, nitrogen

b)

air, tossed salad, fruit cocktail

c)

water, sugar, iron

54.

Aria and Michael are trying to separate a mixture in their science class. Can a mixture be separated? 

a)

No

b)

Yes

c)

Only sometimes

55.

In a science class, Aiden asked, "What is the basic unit of matter?"

a)

a mixture

b)

a substance

c)

an atom

d)

a compound

56.

Abigail and Rohan are analyzing a sample in their chemistry lab. Describe this sample

a)

Pure compound

b)

Mixture of elements

c)

Mixture of compounds

d)

Mixture of elements and compounds

57.
Describe this sample
a)
Pure compound
b)
Mixture of elements
c)
Mixture of compounds
d)
Mixture of elements and compounds
58.

Describe this sample

a)

Pure compound

b)

Mixture of elements

c)

Mixture of compounds

d)

Mixture of elements and compounds

59.
Are these molecules also compounds?
a)
YES
b)
NO
60.
Are these molecules also compounds?
a)
YES
b)
NO
61.

In this diagram, Y represents...

a)

An element

b)

A molecule

c)

A compound

d)

A mixture

62.

In this diagram, X represents...

a)

A compound

b)

A mixture

c)

An atom

d)

An element

63.

This diagram represents...

a)

An element

b)

A molecule

c)

A compound

d)

A mixture of elements and compounds

64.

A Taco is an example of a

a)

Homogeneous Mixture

b)

Heterogeneous Mixture

65.
Two substances physically combined and that appears the same throughout is classified as
a)
A homogeneous mixture
b)
A heterogeneous mixture
c)
An element
d)
  A compound
66.

What type of mixture does this diagram represent?

a)

Homogeneous

b)

Heterogeneous

67.
Coloured water is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
68.

Which of the following are examples of HOMOGENEOUS MIXTURES?


Select all that apply!

a)

Tacos

b)

Air

c)

Steel

d)

Chicken Noodle Soup

69.

Which of the following are examples of HETEROGENEOUS MIXTURES?


Select all that apply!

a)

bucket of Legos

b)

Pizza

c)

Copper

d)

NaCl

70.

Lucky Charms

a)

Heterogeneous

b)

Homogeneous

71.

Chicken noodle soup

a)

Heterogeneous

b)

Homogeneous

72.

M&Ms

a)

Heterogeneous

b)

Homogeneous

73.

Cereal with milk

a)

Heterogeneous

b)

Homogeneous

74.

Identify which images are HETEROGENEOUS MIXTURES! (Check all that apply)

a)
b)
c)
d)
75.

Solutions are ___________ mixtures.

a)

Solid

b)

Homogenous

c)

Heterogeneous

d)

Gas

76.

A fruit salad is a homogeneous mixture.

a)

True

b)

False

77.

Salt (NaCl) is a ____________

a)

An Element, Compound and a Homogenous mixture

b)

A mixture because it has a chemical formula

c)

An Element because it is made of only one type of atom

d)

Compound because it is made from more than one type of element

78.

A chocolate chip cookie is what type of mixture?

a)

A homogenous mixture because the particles are uniformly distributed throughout

b)

A heterogeneous mixture because the particles are unevenly distributed throughout

c)

A Pure substance because the particles can only be separated chemically

79.

A solution such as tea is what type of mixture?

a)

Heterogeneous mixture because the particles are unevenly distributed throughout

b)

Homogenous because the particles are evenly distributed throughout

c)

Tea is a pure substance

80.
True or False: Matter is divided into two main groups: substances and mixtures.
a)
True
b)
False

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