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Pure Substances and Mixtures Quiz Review

Total questions: 35

Worksheet time: 21mins

Name
Class
Date
1.

Instant coffee is made by dissolving a powder in hot water. Instant coffee is a ___________________ .

a)

pure substance

b)

mixture

2.

Methane contains one atom of carbon and four atoms of hydrogen that are chemically bonded. It is a main component of natural gas. Methane is a ___________________ .

a)

pure substance

b)

mixture

3.

Ammonia is a colorless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia is a ___________________ .

a)

element

b)

compound

4.

Nickel has the chemical symbol Ni and atomic number 28. It is a silvery-white metal and cannot be broken down physically or chemically into a more simple substance. Nickel is a ___________________ .

a)

element

b)

compound

5.

In the lab, Maya is using a substance that has a chemical formula and contains two different elements. Maya’s substance is a(n) _______ .

a)

element

b)

compound

c)

heterogeneous mixture

d)

homogenous mixture/solution

6.

Chex mix contains pretzels, rye chips and chex cereal. It is an example of a(n)

a)

solution/ homogeneous mixture

b)

heterogeneous mixture

c)

element

d)

compound

7.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
8.
Compounds are different than elements because compounds are -
a)
A combination of two or more elements.
b)

B)not able to be broken down into parts
c)
made from the same type of atoms
d)
a pure substance, elements are not
9.

Which of these is an element?

a)

Salt (NaCl)

b)

Water (H20)

c)

Oxygen (O)

d)

Carbon Dioxide (CO2)

10.
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
11.

What is this?

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

12.

What is this?

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous MIxture

13.

What is this?

a)

Element

b)

Compound

c)

Heterogeneous MIxture

d)

Homogeneous Mixture

14.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous MIxture

15.

What is it?

a)

Pure Substance

b)

Mixture

16.
a)

Pure Substance

b)

MIxture

17.

A group of 2 or more items, that are not chemically combined

a)

Pure Substance

b)

Mixture

18.

A pure substance is

a)

the way something is put together or combined

b)

two or more different substances not chemically combined

c)

a kind of matter that always has a specific composition chemically combined.

d)

a small number that tells the amount of each element in a compound

19.

An element

a)

contains one type of atom

b)

contains two or more different type of atoms

c)

is two or more different substances not chemically combined

d)

is the way something is put together or combined

20.

What is this?

a)

element

b)

compound

c)

mixture

21.

What is this?

a)

element

b)

compound

c)

mixture

22.

What is this?

salt (NaCl)

a)

element

b)

compound

c)

mixture

23.

What is this?

methane (CH4)

a)

element

b)

compound

c)

mixture

24.

What is this?

aluminum (Al)

a)

element

b)

compound

c)

mixture

25.

Identify the following substance.

a)

Element

b)

Compound

c)

Mixture

d)

Diatomic Molecule

26.

Identify the following substance

a)

Element

b)

Compound

c)

Mixture

d)

Diatomic Molecule

27.

What is an element?

a)

a molecule made with more than one atom

b)

matter consisting of one kind of atom

c)

two or more substances physically combined

d)

a mixture in which the different parts are visible

28.
Describe this sample
a)
Pure element
b)
Pure compound
c)
Mixture of elements
d)
Mixture of compounds
29.
Describe this sample
a)
Pure compound
b)
Mixture of elements
c)
Mixture of compounds
d)
Mixture of elements and compounds
30.
Addie's class is learning about mixtures and solutions. Her teacher writes statements on the board. Which statement BEST describes a mixture?
a)
Both substances mix evenly.
b)
Both substances can evaporate.
c)
One substance dissolves into another.
d)
One substance can be separated from the other.
31.
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.

Which of these is an element?

a)

Salt (NaCl)

b)

Water (H20)

c)

Oxygen (O)

d)

Carbon Dioxide (CO2)

33.
What is the element symbol for: Iron
a)
I
b)
Fe
c)
F
d)
Ir
34.

Iron is ...

a)

a chemical element from the periodic table (Fe)

b)

a man made material

c)

only found on earth in the form of an ore

d)

found in its pure form in the earths crust

35.

True or False: elements AND compounds are pure substances.

a)

True

b)

False

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