Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Unit 2 Review

Total questions: 104

Worksheet time: 2hrs 44mins

Name
Class
Date
1.

Earth's atmosphere is made up mostly of which elements? (6.5B)

a)

Carbon dioxide and oxygen

b)

nitrogen and helium

c)

helium and carbon dioxide

d)

nitrogen and oxygen

2.

Look at the circle graph of the different elements in Earth's crust.


Based on the graph, which conclusion can be drawn about the elements in Earth's Crust? (6.5B)

a)

Iron is more abundant than sodium.

b)

Silicon is more abundant than oxygen.

c)

Aluminum is more abundant than silicon.

d)

Calcium is more abundant than magnesium.

3.

Lorena is in the lab trying to demonstrate that she is capable to create a new substance during his experiments. What are the sign of the formation of a new substance? (6.5C)

a)

A chemical reaction where color and temperature change.

b)

A chemical reaction where formation of gas, change of color, and precipitate happens.

c)

A chemical reaction where a formation of gas, change of color, change of temperature, it precipitates, change of odor might happen.

d)

A chemical reaction where a formation of a new substance happens.

4.

The chemical symbol of an element always matches the element's name.

a)

Agree

b)

Disagree

5.

Which of the following is a compound?

a)

Si

b)

CO2

c)

Cl

d)

He

e)

Ti

6.
a)
Element
b)
Compound
c)
Mixture
7.

Which of the following represents an element?

a)

H2O

b)

HCl

c)

NaCl

d)

Au

e)

CaCO3

8.

Which letter represents an element?

a)

E

b)

B

c)

I

d)

H

9.

Which of the following could be a symbol on the periodic table of elements?

a)

CC

b)

Cc

c)

cc

d)

CcC

e)

CK1

10.

What is NOT made up of two or more elements that are chemically combined?

a)

Element

b)

Compound

c)

Mixture

d)

Solid

e)

Liquid

11.

How many elements are there in CuSO4?

a)

1

b)

2

c)

3

d)

4

e)

5

12.
a)
Element
b)
Compound
c)
Mixture
13.

Which of the following is an element?

a)

Gold

b)

Air

c)

Water

d)

Carbon Dioxide

e)

Nitrous Oxide

14.
a)
Element
b)
Compound
c)
Mixture
15.

Fe is the ___________________ for iron

a)

Letters

b)

Chemical Symbol

c)

Equation

16.

A(n) ______________ is formed when two or more elements chemically combine.

a)

Compound

b)

Element

c)

Mixture

17.
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.
18.

True or false: Compounds have 2 or more elements chemically combined.

a)

True

b)

False

19.

The smallest particle of any particular type of matter is known by which of the following terms?

a)

Element

b)

Chemical

c)

Atom

d)

Compound

20.

True or false: A mixtures parts can be separated.

a)

true

b)

false

21.
What is the chemical symbol for Chlorine?
a)
Cl
b)
Ch
c)
Cr
d)
Ce
22.

Which letter represents a compound?

a)

D

b)

H

c)

E

d)

C

23.
Which of the following is a chemical compound?
a)
Co
b)
 CO2
c)
Mg
d)
Al
24.

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.

d)

useful to human beings

25.

A section of the Periodic Table is shown. What is the Chemical Symbol for Magnesium?

a)

12

b)

Magnesium

c)

24.31

d)

Mg

26.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
27.
A student is examining a sample of the element Bromine in a graduated cylinder. If the liquid is composed of only Bromine atoms, what can the student conclude?
a)
The liquid is not made of elements because it is inside a graduated cylinder.
b)
The liquid is made of elements because it is in a liquid state.
c)
The liquid is made of elements, represented by the symbol Br.
d)
The liquid is made of elements, represented by the symbol B.
28.
Which of the following is an element?
a)
Air
b)
Water
c)
Salt
d)
Oxygen
29.

Which of the following is not an element?

a)

Gold

b)

Silver

c)

Salt

d)

Copper

30.
What is the most abundant element found in the earth's atmosphere?
a)
Oxygen
b)
Sulfur
c)
Nitrogen
d)
Argon
31.

Which element is the second most abundant in Earth's crust?

a)

Oxygen

b)

Calcium

c)

Sodium

d)

Silicon

32.

Two elements that occur in the earth's atmosphere are _____ and _______.

a)

Silicon and Argon

b)

Argon and Aluminum

c)

Nitrogen and Oxygen

d)

Helium and Nitrogen

33.
Which of the following are the elements found in the solid part of the Earth?
a)
Calcium and Oxygen
b)
Oxygen and Silicon
c)
Iron and Oxygen
d)
Potassium and Silicon
34.
Which of the following elements is most abundant in the solid part of the Earth?
a)
Calcium
b)
Iron
c)
Silicon
d)
Potassium
35.

The layer of gases surrounding the earth is called the

a)

Atmosphere

b)

Lithosphere

c)

Biosphere

d)

Hydrosphere

36.

Which element, which is essential for human life, is found in large amounts in both Earth's atmosphere and oceans?

a)

helium

b)

silicon

c)

oxygen

d)

calcium

37.

Look at the data table. Which graph below best represents the most abundant elements in the Earth's crust?

a)
b)
c)
d)
38.

The Earth's crust is primarily made up of which two elements?

a)

nitrogen and hydrogen

b)

oxygen and carbon

c)

silicon and oxygen

39.

Which two elements primarily make up the Earth's atmosphere?

a)

nitrogen and hydrogen

b)

silicon and helium

c)

oxygen and nitrogen

40.

Solid changes to a liquid

a)

Melting

b)

Freezing

c)

Evaporation

d)

Condensation

41.

Liquid changes to a solid

a)

Melting

b)

Condensation

c)

Freezing

d)

Sublimation

42.

Liquid changes to a gas

a)

Freezing

b)

Evaporation

c)

Sublimation

d)

Condensation

43.

Gas changes to a liquid

a)

Condensation

b)

Freezing

c)

Evaporation

d)

Sublimation

44.

What is the main difference between a physical and chemical change?

a)

A physical change does not change the identity of the substance and a chemical change does

b)

A chemical change does not change the identity of the substance and a physical change does

c)

They are the same.

45.

Physical or chemical change?

Bubbles form

a)

Physical Change

b)

Chemical Change

46.

Physical or chemical change?

Change in color

a)

Physical Change

b)

Chemical Change

47.

Physical or chemical change?

Releasing or Absorbing Energy

a)

Physical Change

b)

Chemical Change

48.

Physical or chemical change?

Precipitate Forms

a)

Physical Change

b)

Chemical Change

49.

Physical or chemical change?

Dissolving

a)

Physical Change

b)

Chemical Change

50.

Physical or chemical change?

Breaking

a)

Physical Change

b)

Chemical Change

51.

Physical or chemical change?

Shattering

a)

Physical Change

b)

Chemical Change

52.

Physical or chemical change?

Changing State of Matter

a)

Physical Change

b)

Chemical Change

53.

Physical or chemical change?

A new substance is formed.

a)

Physical Change

b)

Chemical Change

54.

Physical or chemical change?

A change occurs but the substance keeps it's identity.

a)

Physical Change

b)

Chemical Change

55.

A (a)   change is a change where a new substance is formed.

56.

This type of change IS reversible (can be undone).

a)

Chemical

b)

Physical

c)

Endothermic

d)

Exothermic

57.

This type of change is NOT reversible (it can't be undone).

a)

Chemical

b)

Physical

c)

Endothermic

d)

Exothermic

58.
a)
Physical Change
b)
Chemical Change
59.
a)
Physical Change
b)
Chemical Change
60.
a)
Physical Change
b)
Chemical Change
61.
a)
Physical Change
b)
Chemical Change
62.
a)
Physical Change
b)
Chemical Change
63.
a)
Physical Change
b)
Chemical Change
64.
a)
Physical Change
b)
Chemical Change
65.

Rusting nails

a)
Physical Change
b)
Chemical Change
66.
a)
Physical Change
b)
Chemical Change
67.
a)
Physical Change
b)
Chemical Change
68.
a)
Physical Change
b)
Chemical Change
69.
a)
Physical Change
b)
Chemical Change
70.
a)
Physical Change
b)
Chemical Change
71.

Blowing up a balloon

a)

Physical Change

b)

Chemical Change

72.

Rotting apple

a)

Physical Change

b)

Chemical Change

73.

Crumpling Paper

a)

Physical Change

b)

Chemical Change

74.

Cooking Pancakes

a)

Physical Change

b)

Chemical Change

75.

Adding baking soda to vinegar

a)

Physical Change

b)

Chemical Change

76.

Which change describes a substance that changes shape, form, or appearance but is still the same substance?

a)

physical change

b)

chemical change

77.

Color changing, a new smell, and a change in taste are all examples of:

a)

physical change

b)

chemical change

78.

a solid that forms from a solution during a chemical reaction.

a)

precipitate

b)

evidence

c)

physical property

d)

chemical reaction

79.

proof or collected data from observations and experiments

a)

physical property

b)

evidence

c)

state of matter

d)

physical change

80.

a characteristic that can be observed or measured without changing the identity of the substance

a)

state of matter

b)

evidence

c)

physical property

d)

chemical reaction

81.

a physical property that describes matter as a solid, liquid, or gas.

a)

evidence

b)

chemical property

c)

state of matter

d)

chemical reaction

82.

The short way of writing an element's name is called its a (n) ______________.

a)

atom

b)

symbol

c)

sign

d)

element

83.

A chemical symbol never has more than __________ letters.

a)

2

b)

3

c)

4

d)

1

84.

The first letter of a chemical symbol is always a (n) _________letter.

a)

lowercase

b)

uppercase

85.

If a chemical symbol has two letters, the second letter is always a (n) ________ letter.

a)

lowercase

b)

uppercase

86.

The correct way to write the symbol for the element Calcium is

a)

ca

b)

CA

c)

Ca

d)

aC

87.

The correct way to write the symbol for the element Helium is

a)

he

b)

HE

c)

hE

d)

He

88.

Which can be found on the periodic Table?

a)

compounds

b)

elements

c)

molecules

89.

The symbols for the elements on the periodic table are the same in every country.

a)

True

b)

False

90.

How many atoms of carbon (C) are in C6H12O6?

a)

3

b)

6

c)

12

91.

The blue numbers in the image below represent ________

a)

coefficients

b)

subscripts

c)

symbols

92.

How many atoms of sulfur (S) are in H2SO4?

a)

1

b)

4

c)

2

93.

How many Oxygen atoms are in the formula shown?

a)

0

b)

1

c)

2

94.

How many different elements are in the formula shown?

a)

2

b)

4

c)

3

95.

How many different elements are in the formula shown C5H11NO?

a)

5

b)

20

c)

4

96.

How many different elements are in the formula CH2Br?

a)

3

b)

5

c)

6

97.

What is CO2 made of?

a)

0 Carbon, 2 Oxygen

b)

1 Carbon, 2 Oxygen

98.

What is CH4O5 made of?

a)

0 Carbon, 4 Hydrogen, 5 Oxygen

b)

1 Carbon, 1 Hydrogen, 4 Oxygen

c)

1 Carbon, 4 Hydrogen, 5 Oxygen

99.

A chemical formula uses symbols and _______ to represent the names of compounds.

a)

elements

b)

numbers

c)

words

100.

Which of the following will result in a substance with new chemical properties?

a)

Shredding a newspaper

b)

Breaking a mirror

c)

Cutting wood

d)

Popping popcorn

101.

Select all the examples of a chemical change.

a)

ice melting

b)

nail rusting

c)

bread baking

d)

wood burning

e)

milk spoiling

102.

Which is needed for both boiling and melting to occur?

a)

solids

b)

gases

c)

heat

d)

pressure

103.

The boiling of water results in a physical change in matter from

a)

solid to solid

b)

gas to solid

c)

solid to gas

d)

liquid to gas

104.

Physical change is

a)

A change of matter from one form to another without turning into a new substance.

b)

A change that occurs when one or more substances produce new substances with different properties.

c)

The changes that happen to substances during a chemical change.

d)

The temperature at which a solid becomes a liquid. The melting point of water is 0 °C.

Similar Resources on Wayground

Atom & The Periodic Table Review

100 questions

Atom & The Periodic Table Review

quiz

Worksheet

•

5th - 8th Grade

RFMS Science: CSA 2 Review 2024/2025

109 questions

RFMS Science: CSA 2 Review 2024/2025

quiz

Worksheet

•

6th Grade

DPM Review December 2021

100 questions

DPM Review December 2021

quiz

Worksheet

•

6th Grade

Earth and Space Science CAST NGSS

100 questions

Earth and Space Science CAST NGSS

quiz

Worksheet

•

6th - 8th Grade

Catastrophic Events

100 questions

Catastrophic Events

quiz

Worksheet

•

6th - 8th Grade

Physical Science Unit Test

101 questions

Physical Science Unit Test

quiz

Worksheet

•

6th Grade

Seasons

106 questions

Seasons

quiz

Worksheet

•

6th Grade

Ecostudent Challenge 100 Question Quiz

100 questions

Ecostudent Challenge 100 Question Quiz

quiz

Worksheet

•

4th Grade - University