Font size
WorksheetsHon. Phys. Science Midterm
Total questions: 113
Worksheet time: 57mins
What is a statement that summarizes a pattern found in nature?
hypothesis
a fact
scientific theory
scientific law
Why are scientifc models important?
help visulize things that are very complex, very large, or very small
prove scientifc theroy
never change
they make it harder to understand things
Timers at a swim meet used four different clocks to time an event. Which recorded time is the most precise?
55.2s
55.25s
55s
55.254s
Approximately how many kelvins are equal to 37C
-236K
410K
310K
276K
How are sceince and technology related?
Science is a branch of technology
Science and technology are not related
Technology is a branch of natural sceince
Adavances in science may lead to advances in technology and vice versa
What is a physical or mental representation of an object or an event
a scientific law
a theory
a model
a hypothesis
What is a system of knowledge and the methods used to find that knowledge?
technology
measurement
curiosity
science
What are building blocks of all matter?
magnetic fields
kinetic and potential energy
atoms
forces
How do scientists who speak different languages make their data understandable to one another?
they all use SI
they all use different systems of measurement
they communicate through universal translator
they must all speak french
How do scientists communicate the results of investigations
by exchanging e-mails
by publishing articles in scientific journals
by giving talks at scientific conferences
all of the above
Which of the following clocks offers the most precision?
the clock with only one hand to measure the hour
the clock with the hand to measure the hour and the hand to measure the minutes
the clock with the hand to measure the hour, a hand to measure the minutes, and a hand to measure the seconds
the clock with only one hand to measure the minutes
The type of graph used to show a part of something relates to the whole is which of the following?
line graph
direct proportionc
circle graph
bar graph
What is the relationship in which the ratio of the manipulated variable and the responding variable is constant
interdependent
direct proportion
inverse proportion
slope
On Celsius scale, at what temperature does water freeze?
273C
100C
0C
32C
In which step of the scientific method is information obtained through the senses
analyzing data
making observation
drawing conclusions
revising a hypothesis
What is a peer review?
a process in which scientists examine other scientists work
a process in which only close friends of scientist review the scientist's work
a process in which scientists keep their work secret
a process in which scientists copy other scientists' work
Which of the following is NOT a branch of natural science
physical science
life science
social science
Earth & space science
A mixture that appears to contain only one substance is a(n)
homogenous mixture
compound
heterogenous mixture
element
Which of the following is malleable
ice
gold
pottery
glass
A material that is malleable and conducts electricity is most likely
ice
metal
wood
motor oil
Which of the following is a physical change?
a copper roof changing color from red to green
burning a piece of wood
rust forming on an iron fence
sawing a piece of wood in half
Which of the following clocks offers the most precision?
the clock with only one hand to measure the hour
the clock with the hand to measure the hour and the hand to measure the minutes
the clock with the hand to measure the hour, a hand to measure the minutes, and a hand to measure the seconds
the clock with only one hand to measure the minutes
Flammability is a material's ability to burn in the presence of
hydrogen
oxygen
carbon dioxide
nitrogen
which of the following is NOT a clue that chemical change has occurred
change in color
production of gas
formation of a precipitate
change in shape
Which of the following has the highest viscosity?
milk
corn syrup
orange juice
water
When a physical change in a sample occurs, which of the folllowing does NOT change
temperature
volume
shape
composition
Which of the following is a heterogenous mixture
water in a swimming pool
sugar water
a jar of mixed nuts
stainless steel
Which of the following is a clue of a chemical change
iron changes color when heated
balls of wax from when melted max is poured into ice water
gas bubbles form in boiling water
a gas forms when vinegar and baking soda are mixed
What method can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter
filtration
distillation
screening
straining
A substance that has high reactivity
burns in the presense of water
displaces dissolved oxygen
easily combines chemically with other substances
has high boiling point
Which of the following is NOT a pure substance?
water
milk
carbon dioxide
oxygen
Filtration can be used to separate mixtures based on
the size of their particles
their melting point
their boiling point
their densities
A substance that is made up of only one kind of atom is a(n)
element
compound
solution
homogenous mixture
During which of the following chemical changes does a precipitate form?
lemon juice is added to water
vinegar is added to baking powder
milk curdling
a banana ripens
Which of the following is a characteristic of a mixture?
has varying properties
contains only pure substances
has a fixed compostion
all of the above
You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." The soy milk is most likely a
suspension
colloid
pure substance
solution
Which of the following is a mixture?
silicon
sand
carbon dioxide
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
size of its smallest particles
color of its particles
Which of the following are pure substances?
compounds
solutions
homogenous mixture
colloids
If a material contians three elements joinedin a fixed proportion, it is a(n)
atom
mixture
solution
compound
A gas has
a definite volume and definite shape
a definite volume but no definite shape
no definite shape nor definite volume
a definite shape but no definite volume
If you can move a substance from one container to another and its volume changes, the substance is a
gas
liquid
solid
solution
What is the result of a force distributed over an area
volume
mass
temperature
pressure
The heat of fusion for water is the amount of energy needed for water to
freeze
boil
melt
evaporate
The phase change that is reverse of condensation is
melting
sublimation
freezing
vaporization
During which phase change does the arrangement of water molecules become more orderly?
boiling
condensing
freezing
melting
The law that states that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant is
Boyle's law
Bose's law
Charle's law
Einstein's law
Which of the following statements about ice melting is true?
Water molecules lose energy
Water molecules move from their fixed postion
Energy flows from the ice to its surrounding
The temperature of the ice increases as it melts
Which of the following will cause a decrease in gas pressure in a closed container
reducing volume
adding more gas
lowering the temperature
all of the above
The phase change in which a substance changes from a solid to a liquid is
freezing
melting
condensation
sublimation
Boyle's law states that the volume of a gas is inversely proportional to its pressure if the
the number of particles decreases
temperature and the number of particles are constant
temperature and the number of particles are doubled
temperature reaches absolute zero
The temperature and volume in a closed container of a gas remain constant. If the number of particles of a gas is increased, the gas pressure will
decrease
increase
cause a decrease in the average kinetic energy of particles
remain constant
Matter that has a definite volume but no definite shape is a
plasma
liquid
solid
gas
The phase change in which a substance changes from a liquid to a gas
sublimation
condensation
vaporzation
deposition
In which of the substance in the Figure above, are the forces of attraction among the particles are so weak that they can be ignored under ordinary conditions?
Substance B
Substance C
Substance A
all of the above
Ninety-nine percent of all the matter that can be observed in the universe exists as
plasmas
liquids
solids
gases
Raising the temperature of a gas will increase its pressure if the volume of a gas
is constant, but the number of particles is reduced
and the number of particles are constant
and the number of particles are increased
is increased, but the number of particles are constant
During a phase change, temperature of a substance
does not change
increase or decreases
increases
decreases
Which of the following factors affects the pressure of an enclosed gas?
volume
number of particles
temperature
all of the above
The phase change in which a substance changes from a solid to agas or vapor without changing to a liquid first is
vaporization
deposition
sublimation
melting
The phase change that is the reverse of sublimation is
depostion
vaporization
condensation
melting
Which of the following phase changes is an endothermic change
condensation
vaporization
freezing
depostion
Forces of attraction limit the motion of particles most in
a phase change
a physical change
an irreversible change
both a phase change and physical change
Which of the following phase changes is an exothermic change?
vaporization
metling
sublimation
depostion
Collisions of helium atoms with the walls of a closed container cause
gas preasure
an overall loss of energy
condensation
a decrease in volume
J.J Thomson's experiments provided evidence that an atom
has a negative charge
is the smallest particle of matter
contains negatively charged particles
has a positive charge
To find the number of neutrons in an atom, you would subtract
isotope number from atomic number
atomic number from mass number
atomic number from electron number
mass number from atomic number
In an atomic model that includes a nucleus, positive charge is
spread evenly througout the atom
concentrated at multiple sites in an atom
located in the space outside the nucleus
concentrated in the center of an atom
The glowing of a neon light is caused by electrons emitting energy as they
move fronm higher to lower energy levels
move from lower energy levels to higher energy levels
collide with other electrons
collide with the nucleus
Which statement about subatomic particles is NOT true?
Protons and electrons have opposite charges
Protons and neutrons have almost the same mass
Unlike protons and electrons, neutrons have no charge
Protons and neutrons have the same charge
In Niels Bohr's model of the atom, electron move
like popcron in a popcorn popper
like planets orbiting the sun
like balls rolling down a hill
like beach balls on water waves
What can you assume has happened if an electron moves to a higher energy level?
The electron has lost energy
The atom has become more stable
the atom has lost an electron
The electron has gained energy
Which statement about electrons and atomic orbitals is NOT true?
An electron has the same amount of energy in all orbitals
An orbital can contain a maximum of two electrons
An electron cloud represents all the orbitals in an atom
An atom's lowest level has only one orbital
How was Bohr's atomic model similar to Rutherford's model
It described how electrons gain or lose energy
It described a nucleus surrounded by a large volume of space
It described electron position in terms of the electron cloud
It assigned energy levels to electron
Which of the following is unique for any given element?
the charge on the electrons
the mass of a neutron
thr number of neutrons
the number of protons
Which of the following most accuratly represents John Dalton's modek of the atom
a hollow sphre with a dense nucleus
a tiny, solid sphere with a predictable mass for a given element
a sphere that is hollow throughout
a tiny, solid sphere with an unpredictable mass for a given element
The diagram shows the results of Rutherford's gold foil experiment. What caused some of the alpha particles to bounce striaght back from thr gold foil?
the other alpha particles
electrons in the gold atoms
negative charges in the gold atoms
nuclei in the gold atoms
According to John Dalton's observations, when elements combine in a compound,
each element contributes to an equal number of atoms
the ratio of their masses is always the same
their masses are always the same
their volumes are always equal
Which statement is true about oxygen-17 and oxygen-18?
Their atoms have an identical mass
The have the same mass number
They do not have the same number of protons
They are isotopes of oxygen
What is the difference between an atom in the ground state and an atom in the excited state?
The atom in an excited state has one more electron than the atom in the ground state
The atom in the ground state has less energy and is less stable than the atom in the excited state
The atom in an excited state has one fewer electron than the atom in the ground state
The atom in an excited state has more energy and is less stable thsn the atom in the grounded state
Which statement accurately represents the arrangement of electrons in Bohr's atomic model?
Electrons travel randomly in relatively large space outside the nucleus
Electrons vibrate in fixed locations around the nucleus
Electrons travel around the nucleus in fixed energy levels with equal amounts of energy
Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level
Rutherford's gold foil experiment provided evidence for which of the following statements?
Gold is not a dense as previously thought
alpha particles have a positive charge
negative and positive charges are spread evenly throughout an atom
there is a dense, positively charged mass in the center of an atom
What does the electron cloud model describe?
the number of electrons in an atom
the precise location of the electrons in an atom
the mass of the electrons in an atom
the most likely location of electrons in atoms
the number of protons in one atom of an element is that element's
balanced charge
mass number
isotope
atomic number
Which of the following is NOT part of John Dalton's atomic theory?
A compound contains atoms of more than one element
Atoms contain subatomic particles
All elements are composed of atoms
All atoms of the same element have the same mass
Which statement about subatomic particles is true?
Protons, neutrons, and electrons all have the same mass
Neutrons have no charge and no mass
An electron has far less mass than either a proton or neutron
Unlike protons or neutrons, electrons have no mass
Which statement best describes Rutherford's model of the atom?
It is like an avocado with the pit representing the nucleus
It is like a fried egg with the yolk representing the nucleus
It is like a huge stadium with a positively charged marble at the center
It is like an aquarium with swimming fish representing positive charges
What do scientists use to predict the locations of electrons in atoms
probability
ratios and proportions
algebra
geometry
Group 7A of the periodic table contains the
most reactive metals
most reactive nonmetals
least reactive nonmetals
least reactive metals
Which of the following Group 1A elements is the most reactive?
K (potassium)
Na (sodium)
Li (lithium)
Cs (cesium)
Which element is found in nature only in compounds?
sodium
nitrogen
helium
oxygen
A member of the boron family has three valence electrons, while a member of the nitrogen family has
4
5
3
none
Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element
atomic number
atomic mass unit
mass number
isotope number
At room temperature, none of the metals are
malleable
gases
liquids
soft
The unit for atomic mass is
amu
pound
gram
none of the above
Compared with Group 2 A elements, Group 6A elements have
fewer valence electrons
more isotopes
more valence electrons
more atoms in the ground state
Which general statements does NOT apply to metals
Most metals are good conductors of electric current
most metals are brittle
most metals are ductile
most metals are malleable
To keep them from reacting, some highly reactive elements are stored in
liquid mercury
water
argon
pure oxygen
Mendeleev arranged the known chemical elements in a table according to increasing
atomic number
mass
number of electrons
number of protons
One twelfth the mass of a carbon-12 atom is used to define a(n)
atomic mass
atomic mass unit
mass number
atomic number
The atomic mass of an element is
the sum of the protons and neutrons in one atom of the element
a weighted average of the masses of an element's isotopes
twice the number of protons in one atom of the element
a ratio based on the mass of a carbon-12 atom
Which list of elements contains only metals?
iodine, carbon, argon
carbon, iodine, tin
tin, copper, cesium
helium, iron, copper
Two highly reactive elements in Period 2 are the metal lithium and the
nonmetal krypton
nonmetal fluorine
nonmetal selenium
metalloid arsenic
Which halogen is most likely to react?
Cl (chlorine)
F (fluorine)
Br (bromine)
I (iodine)
The usefulness of Mendeleev's periodic table was confirmed by
the discovery of the nucleus
the discovery of subatomic particles
its immediate acceptance by other scientists
the discovery of elements with predicted properties
As you move from left to right across a period, the number of valence electrons
stays the same
increases
decreases
increases and then decreases
Atoms of the most reactive elements tend to have
eight valence electrons
no valence electrons
one or seven valence electrons
four or five valence electrons
The tendency of an element to react is closely related to
attractions between its atoms
the numbers of valence electrons in atoms of the element
its atomic mass
the ratio of protons to neutrons in the atoms of the element
Mendeleev gave the name eka-aluminum to a(n)
rare isotope of aluminum
compound containing aluminum
unknown element he predicted would have properties similar to those of aluminum
mixture of aluminum and an unknown element
Among the alkali metals, the tendency to react with other substances
varies in an unpredictable way within a group
increases from top to bottom within a group
does not vary among the members of the group
decreases from top to bottom within the group
In a periodic table, a set of properties repeats from
row to row
element to element
column to column
group to group
Which statement is NOT true about the element fluorine, chorine, and iodine
They are all halogens
They are all nonmetals
They are similar to noble gases
They react easily with metals
Which element s found in most of the compounds in your body except for water
carbon
iron
iodine
potassium
