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Pure Substances / Mixtures

Total questions: 40

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

A pure substance that cannot be broken down into other substances by chemical or physical means.

a)

compound

b)

atom

c)

mixture

d)

element

2.

Which of these is an element?

a)

Salt (NaCl)

b)

Water (H2O)

c)

Oxygen (O)

d)

Carbon Dioxide (CO2)

3.

Which of these is an compound?

a)

Aluminum (Al)

b)

Carbon Dioxide (CO2)

c)

Nitrogen (N)

d)

Sand

4.

Which of these is not an element or a compound?

a)

Aluminum (Al)

b)

Carbon Dioxide (CO2)

c)

Nitrogen (N)

d)

Sand

5.

Which of these is a mixture?

a)

Laundry Detergent

b)

Oxygen (O)

c)

Salt (NaCl)

d)

Fluorine (Fl)

6.

Air is

a)

An Element

b)

A compound

c)

A mixture

d)

None of these

7.

What is an example of a mixture?

a)

Iron

b)

Soil

c)

ice

d)

gold

8.

Which of the following is classified as a pure substance?

a)

Lemonade

b)

Fruit Punch

c)

Ketchup

d)

Helium

9.

A mixture that is uniform and well mixed is_____.

a)

homogeneous

b)

pure substance

c)

heterogeneous

d)

compound

10.

_________ are the smallest unit of an element that maintains the properties of that element.

a)

Atoms

b)

Elements

c)

Compounds

d)

Mixtures

11.

An ________ is made up of one or more of the same kind of atom chemically combined.

a)

atom

b)

molecule

c)

element

d)

compound

12.

True or False: Elements AND Compounds are pure substances.

a)

True

b)

False

13.

A ________ is made up of different kinds of atoms chemically combined.

a)

element

b)

mixture

c)

compound

d)

molecule

14.

_________ are mixtures in which its particles are too big to stay mixed without being stirred or shaken.

a)

Solutions

b)

Colloids

c)

Suspensions

15.

Milk and pudding are examples of ________.

a)

suspensions

b)

solutions

c)

colloids

16.

A snow globe is an example of a _____________.

a)

suspension

b)

solution

c)

colloid

17.

Tea and air are examples of __________.

a)

solutions

b)

colloids

c)

suspensions

18.

Which of these is an element?

a)

Salt (NaCl)

b)

Water (H2O)

c)

Oxygen (O)

d)

Carbon Dioxide (CO2)

19.
a)

Pure substance

b)

Mixture

20.
a)

Pure Substance

b)

Mixture

21.

Brass

a)

Pure Substance

b)

Mixture

22.
a)

Atoms of an element

b)

mixture

c)

compound

d)

molecule

23.
a)

Elements

b)

Molecules of compounds

c)

an atom

d)

Mixture

24.
a)

compound

b)

mixture

c)

atom

d)

element

25.

Which classification of matter is composed of two or more substances which are physically combined?

a)

atoms

b)

pure substances

c)

mixtures

d)

elements

26.

Which of the following is INCORRECT about pure substances?

a)

formed by two or more compounds

b)

have definite composition

c)

all elements are pure substances

d)

composed of only one kind of material

27.

Pancake batter is a ______.

a)

pure substance

b)

mixture

28.

Which of the following is NOT a mixture?

a)

paint

b)

fruit salad

c)

aluminum (Al)

d)

food coloring in water

29.

Food Coloring mixed in water

a)

homogeneous

b)

heterogeneous

30.

Which of the following are heterogeneous mixtures?

a)

soda and carbonated water

b)

air and sweat

c)

tea and pebbles

d)

coffee drink and lemonade

31.

Salt

a)

pure substance

b)

mixture

32.

Coffee

a)

Pure substance

b)

Mixture

33.

Rubber Tires

a)

Pure Substances

b)

Mixtures

34.

Water

a)

Pure Substance

b)

Mixture

35.

What is anything that has mass and takes up space?

a)

mixture

b)

compound

c)

element

d)

matter

36.

The amount of matter in an object?

a)

mass

b)

mixture

c)

solubility

d)

physical property

37.

Oxygen

a)

pure substance

b)

mixture

38.

On the periodic table, the elements in a period

a)

have similar characteristics

b)

are also in the same family

c)

are lighter on the left and heavier on the right.

d)

are heavier on the left and lighter on the right.

39.

Use the periodic table above to answer the following question.

In group 3, you will find an element with_______.

a)

12 protons

Mg

b)

3 Protons

Li

c)

3 protons and 3 Nuetrons

d)

103 protons

Lf

40.

Use the periodic table to answer the following question.

What is true about

a)

Helium (He) and Neon (Ne) are more similar than Helium (He) and Oxygen (O)

b)

Helium (He) and Oxygen (O) are more similar than Helium (He) and Neon (Ne)

c)

Neon (Ne) and Oxygen (O) are more similar than Neon (Ne) and Helium (He)

d)

There is no way to determine this information from the periodic table.

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