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WorksheetsPhysical Science Final Review
Total questions: 40
Worksheet time: 20mins
Which of the following is NOT a safe laboratory practice?
wearing eye goggles
Following instructions carefully
Wearing flip flops
An organized plan for solving problems by gathering, classifying, and
communicating information is called
scientific method.
scientific science
You notice that the leaves on the trees change colors. Which of the following is NOT a good scientific question which can be tested?
What causes leaves to change color?
How does the amount of light cause the leaves to change color?
Does the amount of precipitation (rain) cause the leaves to change color?
When your teacher asks you to collect evidence during an investigation, which part of the scientific method are they referring to.
collecting data
designing an experiment
creating a hypothesis
Bounty paper towels are advertised to have the best absorption (how much liquid it can hold), how can you test this?
Look it up on the internet.
Use different number of bounty paper towels & different amounts of water.
Use the same amount of different brands of paper towels & same amount of water.
If sugar is a compound and water is a compound, why is sugar water a mixture?
When they are mixed they turn into a new substance with new characteristics.
When they are mixed, their individual characteristics remain
If an unknown substance CANNOT be broken down into simpler substances, it is
a compound.
a mixture
an element
a suspension
Which of the following is a characteristic of a mixture?
has varying properties
has a fixed composition
contains only a pure substance
Which of the following is a heterogeneous (different) mixture?
water in a swimming pool
contact lens solution
a bowl of salsa
Which statement about subatomic particles IS TRUE?
Protons and electrons are located in the nucleus
Neutrons have a neutral charge
Which subatomic particle(s) is equal to the atomic number?
Proton
Neutrons
The mass number is the sum of
protons and neutrons
neutrons and electrons.
neutrons only
If the mass number of an atom is 16 and the atomic number is 9, how many protons are present
8
9
16
Atoms are normally neutral because they contain
mostly neutrons
equal numbers of protons and electrons
greater number of protons
Which element has the electron configuration of 2, 8, 4?
Beryllium- atomic number of 4
Neon- atomic number of 10
Silicon- atomic number of 14
The maximum number of valence electrons in an atom with a stable electron configuration is
4
6
8
An isotope is a different version of the same kind of atom, which of the following is NOT AN ISOTOPE of the other atoms listed?
The first atom has 14 protons, 13 neutrons and 12 electrons
The second atom has 14 protons, 14 neutrons and 12 electrons
The third atom has 13 protons, 14 neutrons and 13 electrons
A new element was discovered and placed into group 16. How many valence electrons does it have?
2
3
6
An atom can become negatively charged by
gaining protons
gaining electrons.
losing electrons.
What is the correct name for the following covalent compound: N2O5?
Nitrogen oxygen
Nitrogen oxide
Dinitrogen pentoxide
Which of the following is diatomic?
NO2
NO
N2
Typically, atoms gain or lose electrons to achieve
an exchange of energy
stable electron configuration
vaporization
The formation of an ionic bond involves the
transfer of neutrons
transfer of electrons
What type of elements give their electrons away?
metals
non-metals
halogens
The correct chemical formula for beryllium phosphide is ______ (Hint: Look up
the charges.)
Be3P2
BeP
Be2P3
In the equation, Fe + xHCl → FeCl2 + H2, the number representing x is:
1
2
3
Which of the following equations is NOT balanced?
2H2 + O2 → 2H2O
HNO3 + Zn → Zn(NO3)2 + H2
2KClO3 → 2KCl + 3O2
The charge of K is +1 and the charge of oxygen is -2. Therefore, the formula for
potassium oxide is:
KO
K2O
2KO
4Al(SO4)3 contains how many sulfur atoms?
12
24
48
Which of the following is NOT an indicator of a chemical reaction?
Gas is produced when Vinegar and baking soda are mixed
A stick of butter is melted when placed in the microwave
A copper penny changes color when exposed to the atmosphere
According to the conservation of mass in a chemical reaction, the atoms on the product side of the chemical equation
can increase.
can decrease.
can stay the same
What coefficients would balance this equation? __ Mg + __ O2 = __ MgO
2 Mg + 2O2 = 1 MgO
2 Mg + 1 O2 = 2 MgO
1Mg + 2 O2 = 1 MgO
Why is the following equation classified as decomposition.
2 KClO3 = 2 KCl + 3 O2
Two smaller compounds form one larger compound
One larger compound is broken up into 2 smaller components
Its not decomposition, it is synthesis.
2Na + Cl2 = 2NaCl. In that equation, “2Na + Cl2” are best described as the
elements.
reactants.
products.
What is the charge of a sulfur ion?
S+1
S-1
S-2
In the following, which number represents the coefficient? 5 Mg3(PO4)2
3
4
5
Which of the following is an endothermic change?
condensation
vaporization
freezing
What is the difference between freezing and melting?
Melting you have to add energy
They are the same thing
Freezing is solid to liquid, melting is liquid to solid
When a substance is heated, the molecules move
faster.
slower.
the same speed
Heat moves from
From higher temperature to higher temperature
From higher temperature to the same temperature
From higher temperature to lower temperature
