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CPET Final Exam

Total questions: 157

Worksheet time: 2hrs 59mins

Name
Class
Date
1.

Arjun and Anika are exploring the magical world of chemistry! They stumble upon a mysterious chemical formula. Can you help them uncover the secret? What do the coefficients in a chemical formula reveal?

a)

number of atoms of an element in a compound

b)

percent composition of that element in a compound

c)

number of molecules of that compound

2.

Emma and Samuel are in a chemistry class, and they stumble upon a magical potion that claims to create new atoms! But wait, which scientific law would tell them that this is impossible?

a)

law of definite proportions

b)

law of conservation of mass

c)

law of percent composition

3.

In the magical world of chemistry, Michael and Scarlett are trying to balance a potion recipe. What do they need to adjust to make sure the potion works perfectly?

a)

subscripts

b)

superscripts

c)

coefficients

4.

During a chemistry experiment, Samuel noticed the beaker was getting hot to the touch. What kind of reaction is he likely observing?

a)

endothermic

b)

exothermic

c)

precipitating

d)

about to explode

5.

In a lab experiment, Ravi observed that a chemical reaction absorbed heat from the surroundings. What type of reaction did Ravi witness?

a)

endothermic

b)

exothermic

c)

neutralization

6.

Imagine you're a detective like Mia, solving the mystery of chemical bonding. Which electrons are the real culprits in forming bonds?

a)

valence electrons

b)

electrons in fully occupied orbitals

c)

stable inner electrons

7.

In their quest to create the perfect elixir, Emma, Liam, and Noah are curious about which component of their mixture is the most abundant. What is your guess?

a)

solvent

b)

solute

c)

crystals

d)

atoms

8.

Aria and Grace are on a quest to find the most acidic substance! Which of the following would have a pH of less than 7?

a)

baking soda

b)

pure water

c)

carbonic acid

9.

Aria and Maya are exploring the world of pH levels. Which of the following substances should they select if they are looking for something with a pH above 7?

a)

ammonia solution

b)

lemon juice

c)

vinegar

10.

In a thrilling science showdown, Aiden and Abigail are comparing two mysterious substances. Substance A has a pH of 2, while Substance B has a pH of 3. Which of the following is true about these intriguing substances?

a)

Substance A has more basic properties than substance B.

b)

Substance B has more acidic properties than substance A.

c)

Substance A is ten times more acidic than substance B.

d)

Substance B is ten times more acidic than substance A.

11.

In a chemistry class, Alex and Jordan are mixing salt into water. They continue adding salt until it no longer dissolves. Is their solution considered saturated?

a)

True

b)

False

12.

Sophia and Liam are arguing: Is the density of ice lower than that of liquid water?

a)

True

b)

False

13.

Hey chemistry detectives! Aria and Noah have another reaction for you to classify. Is this reaction a Composition, Decomposition, Single Replacement, or Double Replacement? Use C, D, SR, or DR as your answer. 2HCl + Mg ----> MgCl₂ + H₂

a)

C

b)

D

c)

SR

d)

DR

14.

Hey there, chemistry detectives! Can you help Jamie determine the type of reaction in this equation? Is it a Composition, Decomposition, Single Replacement, or Double Replacement? Use C, D, SR, or DR as your answer. 2KClO₃ ----> 2KCl + 3O₂

a)

C

b)

D

c)

SR

d)

DR

15.

Hey science detectives! Can you help Charlotte and Ethan figure out what type of chemical reaction this is? Is it a Composition, Decomposition, Single Replacement, or Double Replacement? Use C, D, SR, or DR as your answer. H₂ + Cl₂ ----> 2HCl

a)

C

b)

D

c)

SR

d)

DR

16.

Hey chemistry detectives! Grace and Oliver are on a mission to classify this chemical reaction. Can you help them figure out if it's a Composition, Decomposition, Single Replacement, or Double Replacement reaction? Use C, D, SR, or DR as your answer. CaCO₃ ----> CaO + CO₂

a)

C

b)

D

c)

SR

d)

DR

17.

In their chemistry class, Sarah and John are tasked with balancing chemical equations. They encounter the equation 2H₂ + O₂ ---> 2H₂O. Can you help them determine if this equation is correctly balanced?

a)

balanced

b)

not balanced

18.

Hey chemistry enthusiasts! Liam and Sophia are discussing the reaction C₄H₁₀ + O₂ ---> CO₂ + H₂O. Can you help them determine if this equation is balanced?

a)

balanced

b)

not balanced

19.

Hey chemistry detectives! Liam and Emma are working on balancing a chemical reaction. Can you assist them in determining if the equation Fe + 2HCl ---> FeCl₂ + H₂ is balanced correctly?

a)

balanced

b)

not balanced

20.

In a science class, Ethan and Olivia are learning about acids and bases. They find a substance with a pH of 8. What can they conclude about this substance?

a)

It is acidic

b)

It is neutral

c)

It is basic

21.

The blue numbers in the image below represent ________

a)

solvents

b)

coefficients

c)

subscripts

d)

elements

22.
What is the left part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
23.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
24.

What pH does a neutral substance have?

a)

5

b)

6

c)

7

d)

8

25.

Which of the following is the weakest acid?

a)

bananas (pH 5)

b)

tomatoes (pH 4)

c)

cheese (pH 6)

d)

orange juice (pH 3)

26.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
27.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
28.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
29.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
30.
Bases will turn litmus paper __________, while acids will turn litmus paper __________.
a)
blue.....red
b)
red.....blue
c)
pink.........colourless
d)
colourless..........pink
31.
The pH of a strong base would be:
a)
1-2
b)
5-6
c)
8-9
d)
13-14
32.
The pH of a strong acid would be:
a)
1-2
b)
5-6
c)
8-9
d)
12-13
33.

The density of water

a)

1 gram per cubic centimeter

b)

2 grams per cubic centimeter

c)

5 grams per cubic centimeter

d)

.5 grams per cubic centimeter

34.

Item A and Item B both have a mass of 5 kilograms. Item A has a greater volume than Item B. What is true about Item A’s density?

a)

Item A is more dense than Item B.

b)

Item A is less dense than Item B

c)

Item A has the same density as Item B.

35.

If I cut a potato into cubes to cook it, which property of the potato changed?

a)

weight

b)

mass

c)

density

d)

surface area

36.

If I take a potato to the moon, which property of the potato changes?

a)

weight

b)

mass

c)

density

d)

surface area

37.

The density of a substance with a volume of 50 cubic centimeters and a mass of 350 grams is 8 grams per cubic centimeter.

a)
True
b)
False
38.

The amount of matter

a)

mass

b)

weight

c)

density

d)

volume

39.

the amount of space an object occupies

a)

mass

b)

weight

c)

density

d)

volume

40.

Mass x acceleration due to gravity

a)

mass

b)

weight

c)

density

d)

volume

41.

Mass per unit volume

a)

mass

b)

weight

c)

density

d)

volume

42.

A comparison of two object using numbers is called a relationship.

a)
True
b)
False
43.

The control group in an experiment is used as the basis of comparison.

a)
True
b)
False
44.

Every science experiment begins with a question.

a)
True
b)
False
45.

When using water displacement, you can find volume by ______

a)

Measuring the water that overflows

b)

Measuring the water left behind

c)

Water displacement can’t be used to measure volume.

46.

Choose the correct unit to measure speed

a)

Meters per second

b)

Meters per second squared

c)

Newtons

d)

Joules

47.

Choose the correct unit to measure acceleration

a)

Meters per second

b)

Meters per second squared

c)

Newtons

d)

Joules

48.

Choose the correct unit to measure force

a)

Meters per second

b)

Kilograms

c)

Newtons

d)

Joules

49.

Choose the correct unit to measure work

a)

Meters per second

b)

Kilograms

c)

Newtons

d)

Joules

50.

Choose the correct unit to measure kinetic energy

a)

Meters per second

b)

Kilograms

c)

Newtons

d)

Joules

51.

Because acceleration due to gravity remains constant, we can conclude that a light object and a heavy object will _________.

a)

fall at the same speec

b)

Heavy objects fall faster

c)

Light objects fall faster

52.

The force of gravity is 10.8 meters per second squared.

a)
True
b)
False
53.

F = ma

If I double the amount of mass and keep a constant force, what will happen to the acceleration?

a)

it stays the same

b)

it doubles

c)

it is cut in half

54.

F = ma

If I double the mass and keep the acceleration constant, what will happen to the force?

a)
The force will triple.
b)
The force will remain the same.
c)
The force will double.
d)
The force will decrease by half.
55.

Which of Newton’s laws explains that an object at rest will tend to remain at rest?

a)
Newton's Second Law of Motion
b)
Newton's Third Law of Motion
c)
Newton's First Law of Motion
d)
Law of Universal Gravitation
56.

Which of Newton’s laws states that the acceleration of an object is directly related to the force exerted upon it?

a)
Newton's first law
b)
Newton's third law
c)
Law of universal gravitation
d)
Newton's second law
57.

Which of Newton’s laws states that for every action, there is an equal and opposite reaction?

a)
Newton's Second Law of Motion
b)
Newton's First Law of Motion
c)
Newton's Law of Universal Gravitation
d)
Newton's Third Law of Motion
58.

F = ma

What would an object with a mass of 1000 kilograms weigh in Newtons (approximate)?

a)
5000 Newtons
b)
15000 Newtons
c)
980 Newtons
d)

9800 Newtons

59.

P = mv. 1 kg =1000 g

An object with a mass of 250 g is moving at a velocity of 5 meters per second. What is the object’s momentum?

a)
2.50 kg·m/s
b)
0.50 kg·m/s
c)
1.00 kg·m/s
d)
1.25 kg·m/s
60.

Energy of motion

a)
Potential energy
b)
Nuclear energy
c)
Thermal energy
d)
Kinetic energy
61.

A = final velocity - initial velocity / time

A car goes from at rest to 50 mph in 5 s.

In this case, the initial speed is 50 mph.

a)
True
b)
False
62.

p = mv

The mass of a scooter is halved, what happens to the momentum?

a)
The momentum remains the same.
b)
The momentum doubles.
c)
The momentum is tripled.
d)
The momentum is halved.
63.

p = mv

If I double both the mass and the velocity of a moving car, what will happen to its momentum?

a)
The momentum will quadruple.
b)
The momentum will double.
c)
The momentum will decrease by half.
d)
The momentum will remain the same.
64.

speed an object is moving plus the direction it's moving in

a)
momentum
b)
acceleration
c)
speed
d)
velocity
65.

change in speed over time

a)

speed

b)
acceleration
c)
momentum
d)
velocity
66.

F = ma

An object has a mass of 100 kg and an acceleration of 2 meters per second squared. What is the force?

a)
200 N
b)
100 N
c)
300 N
d)
150 N
67.

F = ma

If I apply a force of 500 N to an object that is 5 kg, what will the acceleration be?

a)
100 m/s²
b)
50 m/s²
c)
200 m/s²
d)
10 m/s²
68.

force x distance

a)

work

b)

kinetic energy

c)

power

d)

potential energy

69.

Energy of position

a)
Kinetic energy
b)
Potential energy
c)
Chemical energy
d)
Thermal energy
70.

The rate at which energy is used

a)
Power
b)
Voltage
c)
Current
d)

Work

71.

Mass x gravity x height =

a)

Potential Energy

b)
Thermal Energy
c)
Kinetic Energy
d)
Mechanical Energy
72.

Which of these is the unit used to measure power?

a)
ohm
b)
volt
c)
joule
d)
watt
73.

Which of these is the unit used to measure work?

a)
joule
b)
newton
c)
pascal
d)
watt
74.

Energy can be destroyed.

a)
True
b)
False
75.

Which of the following would I change to have the greatest effect on kinetic energy?

KE = 12×mv2KE\ =\ \frac{1}{2}\times mv^2

a)

Change the mass to have the greatest effect on kinetic energy.

b)

Change the weight to have the greatest effect on kinetic energy.

c)

Change the velocity to have the greatest effect on kinetic energy.

d)
Change the height to have the greatest effect on kinetic energy.
76.

A force of 100 N is applied to a wall for 15 seconds. How much work was done?

a)
0.5 J
b)
1000 J
c)
0 J
d)
1500 J
77.

A force of 5 Newtons is applied to push a 2 kg box 8 meters across the floor. How much work is done?

a)
20 Joules
b)
10 Joules
c)
30 Joules
d)
40 Joules
78.

W = fd. F = ma

A 10 kg box is lifted 3 meters from the floor. How much work is done?

a)
294.3 J
b)
150 J
c)
300 J
d)
450 J
79.

In a first-class lever, the ______ is in the middle.

a)
lever arm
b)
load
c)
fulcrum
d)
effort
80.

In a third-class lever, the _______ is in the middle.

a)
resistance
b)
fulcrum
c)
effort
d)
load
81.

In a second-class lever, where is the fulcrum?

a)

Between the load and the effort

b)

At the end

c)

There is no fulcrum

d)

In your imagination

82.

37 degrees Celsius =98.6 Fahrenheit

a)

True

b)

False

83.

Boiling point of water in Celsius

a)
100 degrees Celsius
b)
80 degrees Celsius
c)
120 degrees Celsius
d)
90 degrees Celsius
84.

At which temperature Celsius would you probably want to be wearing a winter coat?

a)

-5 degrees Celsius

b)

30 degrees Celsius

c)

20 degrees Celsius

d)
10 degrees Celsius
85.

The human range of hearing is between 0 Hertz and 10,000 Hertz

a)
True
b)
False
86.

A repeated back-and-forth motion

a)
revolution
b)
rotation
c)

Wave

d)
vibration
87.

Which of the following is true about the Doppler effect?

a)

The Doppler effect refers to the saturation of a solution.

b)
The frequency of waves remains constant regardless of motion.
c)
The frequency of waves changes based on the relative motion of the source and observer.
d)

The Doppler effect has nothing to do with sound waves.

88.

A plane traveling at Mach 1 is traveling at twice the speed of sound.

a)
True
b)
False
89.

Number of vibrations per second

a)
Amplitude (A)
b)
Frequency (Hz)
c)
Wavelength (λ)
d)
Phase Shift (φ)
90.

Maximum displacement of a wave

a)
Frequency
b)
Wavelength
c)
Period
d)
Amplitude
91.

Highest point of a wave

a)
Wavelength
b)
Crest
c)
Amplitude
d)
Trough
92.

Lowest point of a wave

a)
Crest
b)
Wavelength
c)
Amplitude
d)
Trough
93.

A greater amplitude makes a sound that is _______

a)
quieter
b)
higher-pitched
c)
louder
d)

Lower-pitched

94.

A greater frequency makes a sound that is ________.

a)

Louder

b)
silent
c)
higher in pitch
d)
lower in pitch
95.

A prism separates colors using

a)

Reflection

b)

Refraction

c)

Luminosity

d)

Absorption

96.

Which of the following is luminous?

a)
A rock
b)
The moon
c)
A shadow
d)
The sun
97.

What is a light ray?

a)
A light ray is a straight line that represents the path of light.
b)
A light ray is a color that can be seen in a rainbow.
c)
A light ray is a particle that bounces off surfaces.
d)
A light ray is a wave that travels in circles.
98.

Light bounces off a surface

a)
Reflection
b)
Absorption
c)
Refraction
d)
Diffraction
99.

Light goes through an object but gets bent.

a)
Reflection
b)
Refraction
c)
Absorption
d)
Transmission
100.

Light does not pass through an object

a)
The object is opaque.
b)
The object is luminous.
c)
The object is reflective.
d)
The object is transparent.
101.

Some light passes through an object.

a)
The object is opaque.
b)
The object reflects all light.
c)
The object absorbs all light.
d)

The object is translucent.

102.

Nearly all light passes through an object.

a)

The object is transparent.

b)
The object is solid.
c)
The object is reflective.
d)
The object is opaque.
103.

We see the color blue because _______

a)

Blue light waves are reflected back while other colors are absorbed.

b)

Blue light waves are absorbed while other colors are reflected

c)

We want to see the color blue

d)

All colors are reflected.

104.

What color comes next in the rainbow?

Red, orange, yellow ____

a)

green

b)

blue

c)

purple

d)

Orange

105.

Sound travels fastest in ______

a)

solids

b)

liquids

c)

gases

d)

the same in all of these

106.

Light travels approximately _______ times faster than sound

a)

100,000

b)

1,000,000

c)

1000

d)

10

107.

We can see ultraviolet light as humans.

a)
True
b)
False
108.

The distance from the crest of one wave to the crest of the next wave

a)
Wavelength
b)
Trough
c)
Amplitude
d)
Frequency
109.

Elements in the same _____ of the periodic table exhibit similar chemical properties.

a)

row

b)

column

c)

Square

110.

What are electrons?

a)

Positively charged particles

b)

Neutrally charged particles

c)

Negatively charged particles

d)

Particles with no charge

111.

Who discovered electrons?

a)

Albert Einstein

b)

Niels Bohr

c)

J.J. Thompson

d)

Ernest Rutherford

112.

What surrounds the tiny, massive, positively charged nucleus according to Rutherford?

a)

Protons

b)

Neutrons

c)

Electrons

d)

Photons

113.

In the Bohr model, where are electrons located?

a)

In the nucleus

b)

In distinct orbits (levels)

c)

Randomly around the atom

d)

In a single orbit

114.

What term describes the allowed transitions of electrons between energy levels in the Bohr model?

a)

Radiationless orbits

b)

Quantum leaps

c)

Random jumps

d)

Continuous transitions

115.

Which subatomic particle has a positive charge?

a)

Neutrons

b)

Electrons

c)

Protons

d)

Photons

116.

Which subatomic particle is found in the nucleus and has no charge?

a)

Protons

b)

Neutrons

c)

Electrons

d)

Positrons

117.

How far do electrons circle from the nucleus according to Rutherford's model?

a)

10 times the radius of the nucleus

b)

1,000 times the radius of the nucleus

c)

10,000 times the radius of the nucleus

d)

100,000 times the radius of the nucleus

118.

What is the charge of a proton?

a)

-1

b)

0

c)

+1

d)

+2

119.

Together with neutrons, what do protons determine?

a)

The atomic number of an element

b)

The chemical properties of an element

c)

The atomic mass of an element

d)

The isotopic abundance of an element

120.

Which subatomic particle is not found in the nucleus of an atom?

a)

Proton

b)

Neutron

c)

Electron

d)

All of the above are found in the nucleus

121.

Which of the following is true about isotopes?

a)

They have different atomic numbers but the same mass number

b)

They have the same atomic number but different mass numbers

c)

They have different numbers of electrons but the same number of protons

d)

They are always ions

122.

What is the mass number of an atom with 6 protons and 8 neutrons?

a)

6

b)

8

c)

14

d)

12

123.
In a neutral atom, the number of electrons is equal to the number of _______.
a)
Neutrons
b)
Orbits
c)
Protons
d)
subatomic particles
124.

Smallest of the 3 subatomic particles

a)

protons

b)

neutrons

c)

electrons

125.

Carbon

a)

CA

b)

Ca

c)

C

d)

Cn

126.

Sulfur

a)

Sf

b)

Sr

c)

S

d)

Su

127.

Neon

a)

Nn

b)

No

c)

N

d)

Ne

128.

Calcium

a)

Ca

b)

CA

c)

Cl

d)

CL

129.

Helium

a)

H

b)

He

c)

HE

d)

Hl

130.

Hydrogen

a)

H

b)

Hy

c)

Hg

d)

h

131.

Potassium

a)

T

b)

P

c)

K

d)

Pm

132.

Aluminum

a)

A

b)

Am

c)

An

d)

Al

133.

The smallest amount you can have of a compound is called a

a)

Molecule

b)

Compound

c)

Atom

d)

Sprinkle

134.

The smallest amount you can have of one element is a(n)

a)

Molecule

b)

Compound

c)

Atom

d)

Sprinkle

135.
What is the chemical symbol for the element oxygen
a)
O
b)
Oxy
c)
ox
d)
Oy
136.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
137.
What is the name of the group that never reacts--ever ever they are stable with a full outermost ring!!!
a)
noble gases
b)
transition
c)
halogens
d)
borons
138.

What are the three main groups of the periodic table?

a)

groups

b)

metal

c)

nonmetals

d)

metalloids

e)

periods

139.

What do the horizontal rows on the periodic table tell us?

a)

The number of orbitals

b)

The number of valence electrons (the electrons on the outer most shell)

140.

What do the vertical columns on the periodic table tell us?

a)

The number of orbitals

b)

The number of valence electrons (electrons on the outer most shell)

141.

Who discovered the nucleus?

a)

Rutherford

b)

Bohr

c)

Thomson

d)

Dalton

142.

Mendeleev's genius was his ability to

a)

predict elements that were not discovered yet

b)

organize elements by their mass

c)

had an element named after himself

d)

organize elements by properties

143.

The first energy shell can hold ______ electrons.

a)

2

b)

8

c)

18

144.

Who invented the Periodic Table?

a)

Mendeleev

b)

Bohr

c)

Lewis

d)

Democritus

145.

When an atom gives away an electron it becomes

a)

an isotope

b)

a negative ion.

c)

a positive ion.

d)

sad.

146.

An atom that has the same number of protons but different numbers of neutrons is an _______________.

a)

isotope

b)

ion

c)

molecule

d)

awesome atom

147.

The diagram shows a model of an atom of a particular element. Which element is represented by the model?

a)
b)
c)
d)
148.

The diagram shows a model of an atom of a particular element. Which element is represented by the model?

a)
b)
c)
d)
149.

Found in group two of the periodic table; highly reactive

a)

period

b)

Alkali Earth Metals (Group 2)

c)

metalloids (semimetals)

d)

alkali metals (group 1)

150.
A charged particle that has gained or lost electrons is called a _____.
a)
molecule
b)
ion
c)
isotope
d)
element
151.

Ionic bonds happen because of the ____ of valence electrons.

a)

sharing

b)

transfer

c)

keeping

d)

covering

152.

How do covalent bonds form?

a)

Donating & receiving valence electrons between atoms

b)

Oppositely charged ions attract each other & form bonds

c)

Scientists are still not sure how they form

d)

Sharing valence electrons between atoms

153.

If Boron has an atomic number of 5, how many valence electrons will it have?

a)
2
b)
4
c)
5
d)
3
154.

You’re drawing the Lewis dot diagram for Aluminum (atomic number: 13). How many dots do you draw around the symbol?

a)
2
b)
4
c)
3
d)
1
155.

You’re drawing the Bohr model for Sulfur (atomic number: 16). How many electrons do you draw total?

a)
16
b)
20
c)
12
d)
8
156.

You’re drawing the Bohr model for Sulfur (atomic number: 16). How many electron shells do you draw?

a)
2
b)
4
c)
5
d)
3
157.

You’re drawing the Bohr model for Neon (atomic number: 10). How many electrons do you draw in the outermost shell?

a)
6
b)
10
c)
4
d)
8

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