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WorksheetsFall Final Review - 2020
Total questions: 42
Worksheet time: 21mins
What type of graph is this.
bar
line
circle
What are the building blocks of all matter?
forces
atoms
kinetic and potential energy
In which step of the scientific method is information obtained through the senses?
analyzing data
drawing conclusions
making observations
What happens when the data in an investigation do not support the original hypothesis?
The data must be incorrect and are thrown out.
The scientist gives up and starts an investigation on a new topic.
The hypothesis is revised.
What is a statement that sumarizes a pattern found in nature?
a scientific theory
a scientific law
a hypothesis
How is 0.00069 written in scientific notation?
69 X 10-5
6.9 X 104
6.9 X 10-4
Timers at a swim meet used four different clocks to time an event. Which recorded time is the most precise?
55.254 s
55.25 s
55 s
On the Celsius scale, at what temperature does water boil?
100 º
0 º
212 º
What is a physical or mental representation of an object or event?
a hypothesis
a theory
a model
The type of graph used to show how a part of something relates to the whole is which of the following?
bar graph
circle graph
line graph
Which of the follwoing are pure substances?
solutions
compounds
homogeneous mixtures
A substance that is made up of only one kind of atom is a(an)
element
compound
homogeneous mixture
A mixture that appears to contain only one substance is a(an)
compound.
heterogeneous mixture.
homogeneous mixture.
A mixture can be classified as a solution, suspension, or colloid based on the
color of its particles.
number of particles it contains
size of its largest particles
Which of the fllowing has the highest viscosity?
milk
water
corn syrup
Filtration can be used to separate mixtures based on
their densities.
their boiling points
the size of their particles
Which of the folowing is a physical change?
rust forming on an iron fence
buringing a piece of wood
sawing a piece of wood in half
Flammability is a material's ability to burn in the presence of
oxygen
hydrogen
nitrogen
Which of the following is a clue of a chemical change?
iron changes color when heated
gas bubbles form in boiling water
a gas forms when vinegar and baking soda are mixed
Ninety-nine percent of all the matter that can be observed in the universe exists as
plasmas
gases
liquids
Matter that has a definite volume but no definite shape is a
gas.
solid.
liquid.
What type of change occurs when water changes from a solid to a liquid?
a mental change
a phase change
an irreversible change
The phase change that is the reverse of condensation is
freezing.
sublimation.
vaporization.
During a phase change, the temperature of a substance
decreases.
increases.
does not change.
During which phase change does the arrangement of water molecules become more orderly?
melting
boiling
freezing
The phase change in which a substance changes from a solid to a liquid is
melting.
condensation.
sublimation.
The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is
deposition.
sublimation.
vaporization.
Which of the following phase changes is an exothermic change?
deposition
vaporization
sublimation
J. J. Thomson's experiments provided evidence that an atom
has a negative charge
is the smallest particle of matter.
contains negatively charged particles.
Rutherford's gold foil experiment provided evidence for which of the following statements?
Alpha particles have a positive charge.
There is a dense, positively charged mass in the center of an atom.
Negative and positive charges are spread evenly throughout an atom.
Which subatomic particle has a negative charge?
proton
neutron
electron
Which statement about subatomic particles is true?
An electron has far less mass than either a proton neutron.
Protons, neutrons, and electrons all have about the same mass.
Unlike protons or neutrons, electrons have no mass.
Which of the following is unique for any given element?
the number of protons
the mass of a neutron
the nmber of neutrons
To find the number of neutrons in an atom, you would take:
atomic number - istope number
mass number - atomic number
atomic number - mass number
In Niels Bohr's model of the atom, electrons move
like balls rolling down a hill.
like beach balls on water waves.
like planets orbiting the sun.
What can you assume has happened if an electron moves to a higher energy level?
The atom has become more stable.
The electron has gained energy.
The electron has lost energy.
What does the electron cloud model describe?
the precise locations of electrons in atoms
the most likely locations of electrons in atoms
the mass of the electrons in an atom
Horseplay or practical jokes in the laboratory are
always against the rules
okay
not dangerous
Approved eye protection devices (such as goggles) are worn in the laboratory
only if you have contact lenses
to improve your vision
any time chemicals, heat, or glassware are used.
What is the symbol for sodium?
S
So
Na
Identify the segments labeled A and B.
A is a group and B is a period
B is a group and A is a period
As you move from left to right across a period, the number of valence electrons
increases.
stays the same
decreases
