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WorksheetsPhysical Science Chemistry Review
Total questions: 95
Worksheet time: 1hrs 5mins
Name
Class
Date
1.
Yolanda filled a beaker with water and measured its temperature as 12°C. She then added some solid CaCl2 and stirred until it was completely dissolved. After 10 minutes she read the final water temperature as 24°C. The air temperature in the room was 26°C.
Which of the following is a possible question Yolanda is seeking to answer:
Which of the following is a possible question Yolanda is seeking to answer:
a)
Does air temperature in the room affect the water temperature?
b)
Does adding CaCl2 to the water affect the temperature of the water?
c)
Does stirring affect the solubility of CaCl2?
d)
Does time affect the solubility of CaCl2?
2.
Which of the following would be most appropriate for measuring the volume of a small, irregular solid?
a)
Flask
b)
Graduated Cylinder
c)
Evaporating Dish
d)
Balance Beam
3.
The pictures below show the position of different elements on the periodic table. Which pricture has an X in the locations of the three elements that would be most similar in the way they react?
a)
A
b)
B
c)
C
d)
D
4.
These pictures show the changes that occur as a solid becomes a gas. What is added to a substance to cause these changes?
a)
force
b)
elements
c)
molecules
d)
energy
5.
Which of the following terms best describes steel?
a)
A
b)
B
c)
C
d)
D
6.
Is grapefruit juice (pH=4.2) an acid or a base?
a)
Acid
b)
Base
7.
Aluminum (Al) has three electrons in its outer shell. Oxygen (O) needs two electrons to complete its outer shell. What is the chemical formula for aluminum oxide?
a)
AlO
b)
AlO2
c)
Al2O
d)
Al2O3
8.
How many protons and electrons are in a copper ion that has a charge of +2?
a)
27 protons, 29 electrons
b)
27 protons, 31 electrons
c)
29 protons, 27 electrons
d)
29 protons, 31 electrons
9.
Which atom has a net positive charge?
a)
Atom W
b)
Atom X
c)
Atom Y
d)
Atom Z
10.
Which of the following was joined by covalent bonding?
a)
PCl3
b)
NaBr
c)
Li2S
d)
MgCl2
11.
In making a pizza, which process involves a chemical change?
a)
mixing spices for the sauce
b)
baking the dough to form the crust
c)
slicing pepperoni for the topping
d)
spreading cheese on the pizza
12.
In the following unbalanced equation, what coefficients would have to go in the blanks (left to right) in order for it to become balanced?
__ Al + __ HCl --> __AlCl3 + __H2
__ Al + __ HCl --> __AlCl3 + __H2
a)
1:3:1:2
b)
3:2:1:2
c)
6:2:2:3
d)
2:6:2:3
13.
Which type of reaction is shown?
a)
A
b)
B
c)
C
d)
D
14.
Which of the following statements describes the difference between endothermic and exothermic chemical reactions?
a)
A
b)
B
c)
C
d)
D
15.
Which list correctly describes the gases in containers R, S,and T?
a)
A
b)
B
c)
C
d)
D
16.
In general, metals react by ___.
a)
sharing valence electrons
b)
gaining valence electrons
c)
losing valence electrons
d)
sometimes
gaining and sometimes losing valence electrons
17.
The pH of milk is 6.4. Based on this information, which of the following statements best describes milk?
a)
Very Basic
b)
Slightly Basic
c)
Very Acidic
d)
Slightly Acidic
18.
Which of the following best describes the location and charges of the three subatomic particles?
a)
Protons (+) / electrons (-) in the nucleus;
neutrons (0) in the cloud.
b)
Protons (+) / neutrons (0) in the nucleus; electrons
(-) in the cloud.
c)
Protons (+) / neutrons (-) in the nucleus; electrons
(0) in the cloud.
d)
Electrons (-) / neutrons (0) in the nucleus; protons
(+) in the cloud.
19.
Which of the following conditions will typically increase the rate of a chemical reaction?
a)
increased
concentration of reactants, increased
temperature, and decreased particle size
b)
use
of a catalysts, decreased temperature, and
increased particle size
c)
decreased
concentration of reactants, increased
temperature, and use of a catalysts
d)
equal
concentration of reactants, increased
temperature, and use of a catalysts
20.
Melissa heated a few blue crystals in a test tube. After a few minutes, she observed that the crystals had turned white and that a film of water had formed on the inside of the test tube. Before Melissa conducted this experiment, she most likely ______________.
a)
developed a theory
b)
developed a conclusion
c)
developed a hypothesis
d)
developed a scientific law
21.
Which group or family of the periodic table will not naturally form compounds with any atom?
a)
Halogens
b)
Nobel Gases
c)
Alkali Metals
d)
Alkaline Earth Metals
22.
Which best represents how electrons are arranged in the energy levels of a carbon atom?
a)
First energy level = 1 electron Second energy level = 5 electrons
b)
First energy level = 3 electrons Second energy level = 3 electrons
c)
First energy level = 2 electrons Second energy level = 4 electrons
d)
First energy level = 4 electrons Second energy level = 2 electrons
23.
A substance has a mass of 24.5 g and a volume of 10.1cm3. What is the density of the substance?
a)
247.5 g/cm3
b)
14.4 g/cm3
c)
34.6 g/cm3
d)
2.43 g/cm3
24.
According to the diagram, what do these processes have in common?
a)
They are all examples of chemical changes.
b)
They are all examples of physical changes.
c)
They are all examples of reactions that require the addition of heat.
d)
They are all examples of unsafe laboratory techniques.
25.
An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom?
a)
29
b)
35
c)
64
d)
93
26.
The graph shown represents the uniform cooling of a sample of a substance, starting with the substance as a gas above its boiling point. Which segment of the curve represents a time when both the liquid and solid phases are present?
a)
EF
b)
BC
c)
CD
d)
DE
27.
Which of the following statements BEST describes the relationship between the water pressure on an object and the depth of the object in the ocean?
a)
A.
Water
pressure has no predictable relationships to depth.
b)
A.
Water
pressure does not change as the depth increases.
c)
Water pressure decreases as the depth increases.
d)
Water
pressure increases as the depth increases.
28.
Once sodium becomes an ion it is considered a?
a)
anion
b)
cation
c)
neutral atom
d)
none of the above
29.
Like salt, what other compound might come together by ionic bonding?
a)
CO2
b)
SiCl4
c)
MgBr2
d)
NO
30.
When potassium sulfide forms, what is its correct chemical formula?
a)
K2S
b)
KS
c)
KS2
d)
K2S2
31.
Is toothpaste (pH=8.5) an acid or a base?
a)
Acid
b)
Base
32.
Acids have a high concentrations of H+ ions.
a)
True
b)
False
33.
Bases have a high concentration of what type of ions?
a)
H+
b)
OH-
34.
Independent variable is...
a)
something I have no control over
b)
Something I am measuring
c)
Something I change in the experiment
35.
Dependent variable is the variable I measure and I have no control over the results.
a)
True
b)
False
36.
Which variable is affected by what is being tested?
a)
Dependent
b)
Independent
c)
Control
37.
Which variable is the one being tested?
a)
Dependet
b)
Independent
c)
Control
38.
What is the dependent variable in this question?
What affect will the shape of the airplane's nose have on the distance it flies?
What affect will the shape of the airplane's nose have on the distance it flies?
a)
hang time
b)
distance
39.
What does the 6 represent above the C
a)
Symbol
b)
Name
c)
Mass Number
d)
Atomic Number
40.
How many electrons can be held in the first energy level ?
a)
1
b)
2
c)
8
d)
16
41.
How many electrons can the 2nd energy level hold ?
a)
2
b)
4
c)
8
d)
16
42.
How many electrons can the 3rd energy level hold?
a)
2
b)
8
c)
16
d)
18
43.
____________ can move from one energy level to another when they gain or lose energy.
a)
electrons
b)
protons
c)
neutrons
d)
atoms
44.
The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.
a)
mass number
b)
atomic number
c)
atomic weuight
d)
isotope weight
45.
Cations are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
46.
Anions are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
47.
What does the following ion mean
Na +1
Na +1
a)
sodium gains an electron
b)
sodium loses an electron
c)
sodium gains a proton
d)
sodium loses a proton
48.
What does the following ion mean
S-2
S-2
a)
sulfur gains 2 electrons
b)
sulfur loses 2 electrons
c)
sulfur gains 2 protons
d)
sulfur loses 2 protons
49.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
50.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
51.
Find the density of a 2 cm x 2 cm x 2 cm cube with a mass of 64 g.
a)
6 cm3
b)
12 g/cm3
c)
128 g/cm3
d)
8 g/cm3
52.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
53.
A combination of substances that are not chemically combined is called a(n)____________.
a)
mixture
b)
compound
c)
physical
54.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
55.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
56.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
57.
A replacement occurs when...
a)
Two formulas combine.
b)
A formula breaks apart.
c)
An atom is replaced during a reaction.
58.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
59.
Which equation obeys the law of conservation of mass?
a)
H2 + O2 ------> H20
b)
C + 2H2 ----> CH4
c)
2Fe2O3 ------> 2O2 + 4Fe
60.
Name ALL the evidences that show a chemical reaction has occurred.
a)
color, gas, light
b)
light, precipitate, odor,
c)
color, gas, light, temperature, precipitate
d)
temperature, smell, light, conductivity, taste
61.
Which coefficient will balance the following equation?
Zn + ___ HCl --> ZnCl2 + H2
Zn + ___ HCl --> ZnCl2 + H2
a)
2
b)
6
c)
4
d)
3
62.
What is a coefficient?
a)
The large number to the left of a chemical formula.
b)
The small number on the right of the chemical symbol.
c)
The small number on the left of a chemical symbol
d)
The large number at the end of a chemical formula
63.
What is the total number of atoms present in 5Na3PO4?
a)
5
b)
40
c)
55
d)
60
64.
What two quantities are needed to calculate density?
a)
weight and mass
b)
mass and volume
c)
temperature and mass
d)
volume and temperature
65.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
66.
Is bleaching your hair a physical or chemical change?
a)
physical
b)
chemical
67.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
c)
chemical reaction
d)
electron change
68.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
69.
Can only be separated by chemical means.
a)
element
b)
mixture
c)
compound
70.
Pepsi
a)
Heterogeneous mixture
b)
homogeneous mixture
c)
compound
71.
It is considered a solution.
a)
Heterogeneous
b)
Homogeneous
c)
Pure substance
72.
What elements generally make a covalent bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
73.
In chemical compounds, covalent bonds form when
a)
the electronegativity difference between two atoms is very large.
b)
electrons are completely transferred between two metals.
c)
pairs of electrons are shared between two nonmetal atoms.
d)
two nonmetal atoms are attracted to each other by opposite charges.
74.
An ionic bond forms when
a)
Valence electrons are shared
b)
a sea of mobile electrons surround the cations
c)
valence electrons are transferred between atoms
d)
none of the above
75.
Predict the bond that will form between Se and Cl.
a)
Ionic
b)
Covalent
76.
What is the same within each group on the periodic table?
a)
the number of protons
b)
the number of electrons
c)
the number of atoms
d)
the number of valence electrons
77.
Acids are what range on the pH scale?
a)
0-14
b)
0-6.99
c)
7
d)
7.1-14
78.
Vinegar is an example of __________
a)
A base
b)
An acid
c)
A neutral substance
79.
The table below shows the pH of several solutions. Which solution has the greatest concentration of H+ ions?
a)
vinegar
b)
milk
c)
water
d)
bleach
80.
Solution with a high pH. Contains a lot of hydroxide ions.
a)
Acidic
b)
Basic
c)
Neutral
81.
Should experiments be repeated over and over to see if the results are the same each time?
a)
yes
b)
no
82.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
83.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?
a)
Type of plant, amount of music, and sunlight
b)
Water, apple juice, milk
c)
Plant growth
84.
A possible explanation to a problem that has not yet been tested.
a)
data
b)
theory
c)
hypothesis
d)
fact
85.
This variable in an experiment is the one being deliberately changed by the scientist.
a)
dependent variable
b)
independent variable
c)
data
d)
control group
86.
Which statement is an inference about this picture?
a)
The van is tan.
b)
The van ran into KFC.
c)
The driver was hungry.
d)
An ambulance may be on the way.
87.
Squidward found new reeds to tryout for his clarinet. He used an APPLAUSOMETER to measure applause after playing Under the Sea with each reed. The results were put in the table.
What was the independent variable?
What was the independent variable?
a)
The Song
b)
The Reed
c)
The Applause
88.
Squidward found new reeds to tryout for his clarinet. He used an APPLAUSOMETER to measure applause after playing Under the Sea with each reed. The results were put in the table.
What was the dependent variable?
What was the dependent variable?
a)
The Song
b)
The Reed
c)
The Applause
89.
The data collected supports which of the following questions that Squidward could have tested?
a)
Which song does the audience prefer?
b)
Which instrument does the audience like best?
c)
Which reed length creates the best sound?
d)
How do applause affect performance?
90.
Squidward found new reeds to tryout for his clarinet. He used an APPLAUSOMETER to measure applause after playing Under the Sea with each reed. The results were put in the table.
What was controlled?
What was controlled?
a)
The Song
b)
The Reed
c)
The Applause
91.
Early scientists thought the shapes of birds' wings helped birds fly. In their first experiments, they made wings the same thickness and shape from front to back. This didn't work. What might these scientists have done after they analyzed their results?
a)
tested the same hypothesis
b)
designed new wing shapes
c)
taken a vacation
92.
Nuclear energy uses _____ to turn turbines to power a generator.
a)
wind
b)
water
c)
steam
d)
solar
93.
How is the heat generated by the reactor core of a nuclear power plant used to provide power to buildings?
a)
It is used directly to heat homes and offices
b)
It generates steam, which turns a turbine, powering a generator
c)
It generates steam, which is then condensed back to water. This process produces energy
d)
All of the above
94.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
decay
d)
gamma radiation
95.
During nuclear fission an unstable isotope produces smaller atoms. Is the total mass of the combined smaller atoms greater than, equal to, or less that the mass of the original atom?
a)
greater than
b)
equal
c)
less than
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