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WorksheetsPhysical Science First Semester Review (Chemistry Unit)
Total questions: 50
Worksheet time: 26mins
How are science and technology related?
Technology is a branch of natural science.
Science is a branch of technology.
Advances in science may lead to advances in technology and vice versa.
Science and technology are not related.
Why are scientific models important?
They prove scientific theories.
They help visualize things that are very complex, very large, or very small.
They make it harder to understand things.
d. They never change.
The type of graph used to show how a part of something relates to the whole is a
circle graph
bar graph
line graph
direct proportion
Which of the following is a characteristic of a mixture?
has varying properties
has a fixed composition
contains only pure substances
has varying properties & a fixed composition
Which of the following has the highest viscosity?
Corn Syrup
Milk
Water
Orange Juice
A substance that has high reactivity
easily combines chemically with other substances
burns in the presence of water
displaces dissolved oxygen
has a high boiling point.
Forces of attraction limit the motion of particles most in
a solid
a liquid
a gas
a liquid & a gas
The phase change that is the reverse of condensation is
freezing
sublimation
vaporization
melting
The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is
sublimation
deposition
evaporation
melting
Which of the following most accurately represents John Dalton’s model of the atom?
a tiny, solid sphere with an unpredictable mass for a
given element
a hollow sphere with a dense nucleus
a tiny, solid sphere with predictable mass for a given
element
a sphere that is hollow throughout
Which statement about subatomic particles is true?
Protons, neutrons, and electrons all have about the same
mass.
Unlike protons or neutrons, electrons have no mass.
Neutrons have no charge and no mass.
An electron has far less mass than either a proton or
neutron.
What do scientists use to predict the locations of electrons in atoms?
probability
algebra
geometry
ratios and proportions
The standard on which the atomic mass unit is based is the mass of a
proton
neutron
chlorine-35 atom
carbon-12 atom
Atoms of the most reactive elements tend to have
one or seven valence electrons.
eight valence electrons.
four or five valence electrons.
no valence electrons.
Which element is found in nature only in compounds?
sodium
helium
oxygen
nitrogen
Which of the following groups contains three elements with stable electron configurations?
lithium, krypton, argon
argon, neon, barium
xenon, neon, boron
helium, xenon, neon
Ionization energies tend to
decrease from left to right across a period.
increase from the top of a group to the bottom.
increase from left to right across a period.
decrease from the top of a group to the bottom.
The name copper(II) indicates that a compound contains
copper ions with an 11+ charge.
copper ions with a 2+ charge.
copper ions with a negative charge.
two types of copper ions.
An industrial process makes calcium oxide by decomposing calcium carbonate. Which of the following is NOT needed to calculate the mass of calcium oxide that can be produced from 4.7 kg of calcium carbonate?
the balanced chemical equation
molar masses of the reactants
molar masses of the product
the volume of the unknown mass
It favors the formation of reactants.
It favors the formation of products.
It does not change.
We do not know.
The solubility of carbon dioxide gas in water can be increased by
increasing the temperature.
agitating the mixture.
increasing the pressure.
using more solvent.
Which of the following is NOT a common property of bases?
feels slippery
tastes bitter
reacts with metals
changes colors of indicators
The products of the neutralization reaction between hydrochloric acid and magnesium hydroxide are
MgCl and H2O
MgCl2 and H2O
HCl and MgOH
HCl and Mg(OH)2
Which of the following statements explains why inhaling carbon monoxide is dangerous?
Carbon monoxide reacts with oxygen to produce carbon
dioxide.
Carbon monoxide keeps hemoglobin in the blood from
carrying oxygen to cells.
Carbon monoxide is a colorless, odorless gas.
All of these are correct.
Proteins that act as catalysts for chemical reactions that occur in cells are
vitamins
enzymes
carbohydrates
amino acids
Which of the following is NOT one of the main ideas of physical science?
The universe is very old and very large.
Forces cause changes in motion.
Energy can be transferred from one form to another, but it can never be destroyed.
One of the main branches of natural science is biology.
What is the most important safety rule?
Never work with chemicals.
Always use unbreakable glassware.
Always follow your teacher’s instructions and textbook
directions exactly.
Never do experiments that involve flames or hot objects.
How do scientists communicate the results of investigations?
by publishing articles in scientific journals
by giving talks at scientific conferences
by exchanging e-mails
all of these
A substance that is made up of only one kind of atom is a(an)
compound
homogeneous mixture
element
solution
A mixture can be classified as a solution, suspension, or colloid based on the
number of particles it contains.
size of its largest particles.
color of its particles.
size of its smallest particles.
Which of the following is a chemical change?
ice melting
ice being carved
water boiling
water breaking down into hydrogen and oxygen
A gas has
a definite volume but no definite shape.
a definite shape but no definite volume.
no definite shape or definite volume.
a definite volume and definite shape.
The temperature and volume in a closed container of gas remain constant. If the number of particles of gas is increased, the gas pressure will
increase.
decrease.
remain constant.
cause a decrease in the average kinetic energy of the
particles.
Which subatomic particle has a negative charge?
electron
alpha particle
neutron
proton
What does the electron cloud analogy suggest?
An electron cannot be precisely located at any one
moment in time.
Protons move occasionally.
Protons and neutrons spin around each other.
Atoms do not stay still long enough to be observed.
One-twelfth the mass of a carbon-12 atom is used to define a(an)
atomic number.
atomic mass.
mass number.
atomic mass unit.
The column on the far left of the periodic table contains the
most reactive metals.
most reactive nonmetals.
least reactive nonmetals.
least reactive metals.
As you move from left to right across a period, the number of valence electrons
increases.
stays the same.
increases and then decreases.
decreases.
Typically, atoms gain or lose electrons to achieve
an exchange of energy.
ionization.
a stable electron configuration.
vaporization.
Which of the following compounds does NOT contain molecules?
H2
NaCl
CO2
H2O
Which statement about metals is true?
A metal lattice is extremely rigid.
A metal lattice has weak bonds within a metal.
Electrons in a metal lattice are free to move.
Generally, metals have a low melting point.
When the forward and reverse paths of a change occur at the same rate,
the system is conserved.
the system is in equilibrium.
the change must be physical.
the change must be chemical.
A salt is dissolved in water, which has a boiling point of 100°C. The boiling point of the solution will be
greater than 100°C.
less than 100°C.
exactly equal to 100°C.
exactly equal to 0°C.
A base is defined as a compound that produces
hydroxide ions in solution.
hydrogen ions in solution.
hydronium ions in solution.
sodium ions in solution.
A substance that ionizes or dissociates into ions when placed in water is always a(an)
conductor.
electrolyte.
strong acid.
strong base.
Which of the following statements helps explain why there are millions of carbon compounds?
Carbon has four valence electrons.
Carbon atoms form bonds with other carbon atoms.
Carbon atoms can form single, double, and triple bonds.
All of These
Which of the following is NOT an example of a fossil fuel?
coal
petroleum
natural gas
methanol
Natural polymers are produced
only in plant cells.
only in animal cells.
in both plant and animal cells.
in neither plant nor animal cells.
_______ is a process that could be used to separate dissolved particles from the liquid in a solution.
Filtration
Osmosis
Distillation
Screening
A(An) _____ change occurs when a material changes shape or size but the composition of the material does not change.
physical
chemical
permanent
temperary
