WorksheetsPhysical Science Midterm Review Guide
Total questions: 40
Worksheet time: 28mins
In the scientific method, what is the term for a factor that is kept the same throughout an experiment?
Independent Variable
Dependent Variable
Constant
Control Group
Identify the variable being measured for Liters (L).
Length
Volume
Mass
Temperature
Fill in the blank: A mixture that has a uniform composition throughout is called a ________ mixture.
Homogeneous
Heterogeneous
What is an Anion?
Positively charged ion
Negatively charged ion
Neutral atom
Isotope
A Neutral Oxygen-15 atom has ___ protons, ___ neutrons, and ___ electrons.
A) 8, 7, 8
B) 8, 8, 7
C) 7, 8, 8
D) 8, 7, 7
How many valence electrons make an atom stable?
2
4
6
8
What is the formula for Beryllium fluoride?
BeF
BeF2
Be2F
None of the above.
Which of the following reactions is a combustion reaction?
C2H6 + O2 → CO2 + H2O
NH3 + H2(SO4) → (NH4)2(SO4)
F2 + N2 → NF3
KClO3 → KCl + O2
F2 + N2 → NF3. What is the reaction type?
Synthesis
Decomposition
Single Replacement
Combination
What is the importance of the law of conservation of mass in balancing chemical equations?
It ensures mass is created
It ensures mass is destroyed
It ensures mass is conserved
It ensures mass is doubled.
The variable that is being measured or observed is called the .
Dilcia wants to know how drinking milk affects how tall a Monica grows. Which is the independent variable?
Monica's growth
drinking milk
Barry runs an experiment to see if changing the type of gasoline affects how fast a car can drive. What's the independent variable?
The type of gasoline
How fast the car can drive
Which car you're driving
The road you drive on
Electrons are found in the
An atom with the same number of protons and electrons has a net charge.
positive
negative
The chemical bond that forms when electrons are shared is called:
Ionic
hydrogen
covalent
When an atom loses or gains an electron it is called a(an)
isotope
compound
ion
molecule
What is an ionic bond?
nonmetal bonded with a nonmetal
metal bonded with a nonmetal
The compound calcium chloride, CaCl2,uses _______ bonds to hold the atoms together.
metallic
ionic
covalent
intrinsic
What type of bond is formed when two nonmetals share electrons?
Ionic
Covalent
Bubbles form when two or more substances are combined is a
True or False: a test may have more than one independent variable
true
false
Steve wanted to see if the type of fertilizer he uses in his garden makes his sunflowers grow larger. If he did an experiment to find this out, what would be the independent variable?
Type of fertilizer
Size of sunflower
type of sun flower
What is the chemical symbol for Potassium?
Po
Pt
P
K
What is the term for a reaction where a compound breaks down into two or more simpler substances?
Synthesis
Decomposition
Combustion
Single Replacement
Which picture has no definite volume?
A
B
C
Which picture is a solid?
A
B
C
At what point does a liquid change to a gas?
freezing
vaporization (evaporation/boiling)
melting
condensation
What tool does the picture represent? What is the tool used to measure?
graduated cylinder, volume
graduated cylinder, mass
triple beam balance, volume
Which of the following has the greatest density?
A
B
C
Which liquid is the most dense?
lamp oil
milk
soda cap
corn syrup
Isotopes are atoms of the same element but can have different numbers of ____________.
protons
neutrons
electrons
quarks
Al + O2 --> 2Al2O3
