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Chemical and Physical Changes in Matter

Total questions: 48

Worksheet time: 3590secs

Name
Class
Date
1.
Which of the following is a chemical change?
a)
Iron rusting 
b)
Glass breaking
c)
Clothing ripping
d)
Hair cut
2.
What is the law of conservation of matter?
a)
Matter changes when reacted or changed.
b)
The mass of all reactants are changed during a physical or chemical change.
c)
The mass of the reactants is the same as the mass of the products.
d)
The mass of the products is different than the mass of the reactants.
3.
Which of the following is evidence of a chemical change?  
a)
Change in state
b)
No new substance is formed
c)
Bubbles forming
d)
Change in shape
4.
Which of the following is an example of a physical change, and why? 
a)
Fire burns in fireplace, because a new substance is formed. 
b)
Clothes are folded, because there is a color change. 
c)
A mirror is broken, because there is a change in shape/size.
d)
cookies are baked, because there is a change in temperature
5.
This number is used to represent the number of each atom being represented.  What is the name of this number? 
a)
An Exponent
b)
The Coefficient
c)
A Molecule
d)
The Subscript
6.
This appears on the left side of a chemical formula, and represents how many compounds there are.  What is the name of this number?
a)
A Dangling Participle 
b)
The Subscript
c)
A Prime Number
d)
The Coefficient
7.
How many hydrogen atoms are in this chemical formula: 
a)
4 hydrogen atoms
b)
1 hydrogen atom
c)
2 hydrogen atoms
d)
3 hydrogen atoms
8.

Identify the elements in this compound.

a)

Carbon, Helium, Oxygen

b)

Chromium, Hydrogen, Oxygen

c)

Calcium, Hydrogen, Oxygen

d)

Carbon, Hydrogen, Oxygen

9.

Which is an example of an heterogenous mixture?

a)

soy sauce

b)

salad

c)

tea

d)

guacamole

10.

Metals are located on what size of the periodic table?

a)

left

b)

right

c)

the stairway

d)

the bottom

11.
Which of the following is described as the basic unit of matter?
a)
Element
b)
Atom
c)
Molecule
d)
Compound
12.

In this chemical equation, the elements in red are the_______.

a)

Products

b)

Reactants

c)

Subscripts

d)

Coefficients

13.

Label the picture as a physical change or a chemical change.

a)

physical change

b)

chemical change

14.

Label the picture as a physical change or a chemical change.

a)

physical change

b)

chemical change

15.

A change that does not result in a new substance.

a)

smoke

b)

physical

c)

chemical

d)

react

16.

What you see when you light a campfire that is a sign of a chemical change.

a)

chemical

b)

react

c)

rust

d)

smoke

17.

Label the picture as a physical change or a chemical change.

a)

physical change

b)

chemical change

18.

Which of the following is NOT a physical change?

a)

Crushing a can

b)

boiling water

c)

shredding paper

d)

burning paper

19.

How many different elements are present in H2C2H3O2?

a)

1

b)

2

c)

3

d)

4

20.

Which of these elements is not present in NaNO3?

a)

sodium

b)

hydrogen

c)

oxygen

d)

nitrogen

21.

How many magnesium atoms are found in MgCl2?

a)

1

b)

2

c)

3

d)

4

22.

How many aluminum atoms are found in Al2O3?

a)

1

b)

2

c)

3

d)

4

23.

How many sulfur atoms are present in Al2(SO4)3

a)

1

b)

2

c)

3

d)

4

24.

A subscript will tell you the number of atoms of the element ___ it

a)

after

b)

before

25.

A subscript behind a set of parentheses belongs to

a)

the element right before it

b)

all the elements within the parentheses before it

c)

all the elements in the parenthese after it

d)

the element right after it

26.

If there is no subscript, how many atoms of that element are there?

a)

1

b)

2

c)

3

d)

0

27.

How many atoms of carbon are in this compound?

H2C3O4N5

a)

2

b)

3

c)

4

d)

5

28.

How many oxygen atoms are found here?

Mg(NO3)2

a)

2

b)

4

c)

6

d)

8

29.
How many atoms of Oxygen are in this compound?
a)
1
b)
2
c)
3
d)
4
30.
Ice melting
a)
Chemical Change
b)
Physical Change
31.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
32.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
a)
balanced
b)
unbalanced
33.

In reactions, products must be equal to..

a)

Products

b)

Reactants

c)

Starters

d)

Enders

34.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
35.

The process by which one or more substances change to produce one or more different substances

a)

Chemical Process

b)

Reactant

c)

Chemical Reaction

36.

Serotonin is a chemical substance that acts as a neurotransmitter. It helps relay messages in the human brain. The formula for one molecule of serotonin is shown below.

C10H12N2O

How many atoms in all are in a molecule of serotonin?

a)

1

b)

4

c)

25

d)

24

37.

A student mixes two solutions (liquids), planning to produce carbon dioxide. Which of the following is the BEST evidence that a chemical reactions as taken place and carbon dioxide (gas) has been formed.

a)

Color Change

b)

Temperature Change

c)

Formation of bubbles

d)

formation of a solid

38.

When two liquids are mixed together and a solid is formed, what do we call it?

a)

Metal

b)

A rock

c)

Precipitation

d)

Precipitate

39.

What does the Law of Conservation of Mass state?

a)

matter can always been created

b)

matter is always destroyed

c)

matter cannot be created or destroyed

d)

Matter can be destroyed, but never created

40.

Products are found on what side of the arrow?

a)

Right

b)

Left

41.

Reactants are found on which side of the arrow?

a)

Right

b)

Left

42.

Which is NOT a sign that a chemical reaction has occurred?

a)

Temperature Change

b)

Gas Formation

c)

Substance Melts

d)

Odor is Released

43.

How many atoms are in the molecule?

(a)  

44.

LT#2: Use the equation: Na + H2O ⟶\longrightarrow NaOH + H2O

a)

Balanced

b)

Unbalanced

45.

LT#2: Use the equation: C2H6O + 3O2 ⟶\longrightarrow 2CO2 + 3H2O

a)

Balanced

b)

Unbalanced

46.

What is the Coefficient?

a)

4

b)

3

c)

1

d)

0

47.

How many Bromine atoms are there in the compound?

a)

4

b)

7

c)

12

d)

6

48.

How many Nitrogen atoms are in the in H3C2ON5?

a)

2

b)

3

c)

4

d)

5

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