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STEM and STEM HONORS Midterm Exam Quiz

Total questions: 113

Worksheet time: 2hrs 38mins

Name
Class
Date
1.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
a)
balanced
b)
unbalanced
2.
True or False: When balancing chemical equations the subscripts can change.
a)
true
b)
false
3.
Which of the Following Correctly Balances this Equation? 
_H2+_Cl2 --> _HCl
a)
2H2 + Cl2 --> 4HCl
b)
H2+Cl2 --> 2HCl
c)
3H2 + 3Cl2 --> HCl
d)
H + Cl --> HCl
4.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
5.
When balancing equations what does
 -->
mean?
a)
subscript
b)
equals
c)
it is just an arrow
d)
yield
6.
Classify the following chemical reaction:
4P +5O2 --> P4O10
a)
single replacement
b)
double replacement
c)
synthesis
d)
decomposition
7.
Which of the following is an unbalanced equation?
a)
CaCO3 --> CaO + CO2
b)
PbO2 + 2H2-->2Pb + H2O
c)
2Na+ 2H2O-->2NaOH + H2
d)
CS2 + 2O2 --> CO2 + 2SO
8.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
9.
Which of the following is evidence of a chemical reaction?
a)
fizzing
b)
water changing to ice
c)
saltwater
d)
paper being cut in half
10.
When a chemical reaction is classified as decomposition what happens in the experiment?
a)
The elements are combined to create one chemical formula.
b)
The elements break down
c)
The elements replace each other
11.
True or False: Chemical equations use symbols instead of words to summarize chemical reactions.
a)
false
b)
true
12.
The substances at the beginning of a chemical reaction are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
13.
What is the part of the chemical equation in green called? 
Fe + S --> FeS
a)
products
b)
reactants
c)
yield
d)
chemical formula
14.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
15.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
16.
Why is the following chemical equation not balanced?
H2 + O2 --> H2O
a)
each side of the equation has a different number of oxygen atoms
b)
each side of the equation has a different number of hydrogen atoms
c)
each side has the same mass
17.
What category does the following equation belong in?  
 Cl2 + NaBr --> NaCl + Br2
a)
double replacement
b)
single replacement
c)
decomposition
d)
synthesis
18.
What is the name of the electrons in the highest or outermost unfilled energy level of an atom called?
a)
electric electrons
b)
lucky electrons
c)
Valence electron
d)
ions
19.
What kind of bond forms when atoms share electrons?
a)
Chemical bond
b)
Ionic bond
c)
Covalent bond
d)
Electron bond
20.

What kind of bond forms when one kind of atom gives electrons (electrons are transferred) to another kind of atom?

a)

Chemical bon

b)

Ionic bond

c)

Covalent bond

d)

Electron bond

21.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
22.
Which of the following has six valence electrons?
a)
Sodium
b)
Iodine
c)
Oxygen
d)
Neon
23.
Write the chemical formula based off of Calcium=Ca with oxidation number of +2 and Chlorine=Cl with oxidation number of -1
a)
Ca2Cl
b)
CaCl2
c)
CaCl
d)
CaCl3
24.
Write the chemical formula for Lithium=Li (oxidation number 1+) and sulfur =S  (oxidation number -2).
a)
Li3S2
b)
Li3s
c)
Li2S
d)
LiS
25.
What is oxidation number for Beryllium?
a)
+2
b)
+1
c)
+3
d)
-1
26.
Which element is more reactive-- Copper or Magnesium?
a)
Copper
b)
Magnesium
27.

Atoms that gain or lose electrons and thus acquire and electrical charge are called

a)

ions

b)

elements

c)

alloys

d)

compounds

28.

Groups of atoms held together by covalent bonds are called

a)

mixtures

b)

elements

c)

molecules

d)

alloys

29.

Which group is the LEAST reactive?

a)

Alkali Metals

b)

Halogens

c)

Noble Gases

d)

Group 2 Metals

30.

Chemical formulas represent the number and element of each type of atom in

a)

mixtures only

b)

ionic compounds only

c)

both ionic and covalent compounds

d)

covalent compounds only

31.

When atoms react

a)

energy is released by the atoms as the chemical bonds are formed

b)

energy must be absorbed by the atoms to form bonds

c)

energy is released as bonded atoms are separated

d)

no change in energy occurs

32.

Which of the following elements is MOST reactive

a)

carbon

b)

oxygen

c)

fluorine

d)

argon

33.

What is the oxidation number for the halogens?

a)

1-

b)

1+

c)

2-

d)

2+

34.

What is the oxidation number for the halogens?

a)

1-

b)

1+

c)

2-

d)

2+

35.

What is the oxidation number for the halogens?

a)

1-

b)

1+

c)

2-

d)

2+

36.

Elements in group 1 of the periodic table are called alkali metals. What do these elements have in common when ionized?

a)

an oxidation number of 1+

b)

an oxidation number of 1-

c)

an oxidation number of 2+

d)

an oxidation number of 2-

37.

Which of the following is FALSE in regards to what a chemical formula tells you about a compound?

a)

Chemical symbols for each element in a compound are given.

b)

The subscript tells how many of each type of element are in that compound.

c)

Elements with a positive oxidation number are usually listed first.

d)

Elements with a negative oxidation number are usually listed first.

38.

When Al 3+ combine with (OH)1-, what compound is formed?

a)

Al(OH)3

b)

AlOH3

c)

AlO3H3

d)

Al3OH

39.

A group of atoms that forms a compound held together by covalent bonds is called a

a)

ion

b)

crystal

c)

molecule

d)

mixture

40.

A group of atoms that forms a compound held together by covalent bonds is called a

a)

ion

b)

crystal

c)

molecule

d)

mixture

41.

Predict the oxidation number for K

a)

1+

b)

1-

c)

2+

d)

2-

42.

Predict the oxidation number for Cl

a)

1+

b)

1-

c)

2+

d)

2-

43.

Name this element: NaF

a)

sodium fluorine

b)

sodide fluoride

c)

sodium fluoride

d)

Sodium fluorous

44.

Select the correct chemical formula for the compound formed when Mg2+ and Br1- combine:

a)

Mg2Br

b)

MgBr

c)

MgBr2

d)

Mg2Br2

45.
If one variable increases and the other decreases it is a(n)_________relationship
a)
direct
b)
inverse
c)
diverse
d)
longitudinal
46.
There are ___ meters in 25 kilometers (km)
a)
250 m
b)
2500 m
c)
25000 m
d)
.025 m
47.
There are ___ millimeters(mm) in 2.7 centimeters (cm)
a)
270 mm
b)
.27 mm
c)
27 mm
d)
.027 mm
48.
Convert 0.25 m to mm
a)
25
b)
2.5
c)
250
d)
0.025
49.
convert 30 cm to m
a)
300
b)
3
c)
0.03
d)
0.3 m
50.
345mg=________g
a)
34.5
b)
.345
c)
.0345
d)
34500
51.
How many seconds are in 2.46 minutes?
a)
147.6 s
b)
246 s
c)
166 s
d)
2460 s
52.
What is the abbreviation for milligram ?
a)
g
b)
m
c)
mg
d)
ml
53.
What does the abbreviation km stand for?
a)
kilo
b)
kilometer
c)
kilogram
d)
meter
54.
Fill in the blank: 1g = _________ mg.
a)
.1
b)
10
c)
100
d)
1000
55.
The base SI unit for mass is the
a)
meter
b)
gram
c)
kilogram
d)
liter
56.
The base SI unit for length is the
a)
second
b)
gram
c)
meter
d)
liter
57.
The______variable goes on the x-axis
a)
Independent 
b)
Dependent
c)
no clue
d)
I forget
58.
What type of graph is this?
a)
Bar Graph
b)
Line Plot
c)
Pictograph
d)
Tally Chart
59.
What type of graph is this?
a)
Bar Graph
b)
Pictograph
c)
Line Plot
d)
Tally Chart
60.
What is the title of the graph?
a)
Number of people
b)
Character
c)
Favorite Cartoon Characters
d)
Sponge Bob
61.
What are graphs used for?
a)
To show data
b)
To keep track of things so you don't forget
c)
To catch the eye and look colorful 
d)
To draw pictures on
62.
The line that runs horizontally is called the?
a)
x-axis
b)
I have no clue
c)
y-axis
d)
a line
63.
Accuracy is defined as
a)
close repeated measurements
b)
awesome measurements
c)
really good guessing
d)
measurement near the true value
64.
Measurements that are repeated and close to each other can be defined as:
a)
accurate
b)
accurate and precise
c)
precise
d)
estimated
65.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
66.
What is the Volume?
a)
63.5 mL
b)
63 mL
c)
63.55 mL
d)
6 mL
67.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
68.
How many significant figures does the following number have: 100.3
a)
4
b)
3
c)
5
d)
2
69.
How many sig figs are in 90000 ml
a)
1 sig fig
b)
5 sig figs
c)
4 sig figs
70.
How many sig figs in 900. g/ml
a)
1 sig fig
b)
2 sig figs
c)
3 sig figs
d)
none
71.
Which of these is a quantity of time?
a)
2:35pm
b)
midnight
c)
30 seconds
d)
January 1, 2016
72.
You know 16 cups = 1 gallon. Convert 3.5 gallons into cups.
a)
56 cups
b)
0.21875 cups
c)
19.5 cups
d)
48 cups
73.
You know that 12 inches = 1 foot.  Convert 60 inches to feet.
a)
720 feet
b)
5 feet
c)
5 inches
d)
72 feet
74.
My cup of coffee hold 350 mL (milliliters) how many kL (kiloliters) is my coffee cup
a)
350
b)
35
c)
.35
d)
.00035
75.
What is the label on the y-axis (the Dependent Variable) for graph C?
a)
Reading
b)
Mathematics
c)
Scatterplot
d)
Line of best fit
76.

The______variable goes on the x-axis

a)

Independent

b)

Dependent

c)

no clue

d)

I forget

77.
The information you collect in an experiment in order to answer a question is called 
a)
evidence.
b)
hypothesis.
c)
variable.
d)
opinion.
78.
The process of learning that starts with asking questions and proceeds by seeking the answers to the questions is called
a)
natural law.
b)
theory.
c)
inquiry.
d)
variable.
79.
The process of learning that starts with asking questions and proceeds by seeking the answers to the questions is called
a)
natural law.
b)
theory.
c)
inquiry.
d)
variable.
80.
To figure out an answer using logical thinking is called
a)
reduction.
b)
induction.
c)
deduction.
d)
serendipity.
81.
A scientific theory is a 
a)
statement that explains a complex idea and is supported by much evidence. 
b)
statement of observed facts.
c)
general statement that is accepted as true.
d)
scientific approach to problem solving.
82.
An event during which an important discovery is made accidentally is called discovery by:
a)
trial and error.
b)
scientific method.
c)
serendipity.
d)
design.
83.
After testing, you find that your hypothesis is not true.  What does this mean?
a)
The experiment is a failure.
b)
The results are useless.
c)
The design of the experiment was bad.
d)
The results may be useful,but further testing and redesign of the experiment may be needed.
84.
After testing, you find that your hypothesis is not true.  What does this mean?
a)
The experiment is a failure.
b)
The results are useless.
c)
The design of the experiment was bad.
d)
The results may be useful,but further testing and redesign of the experiment may be needed.
85.
Which one of these is an opinion?
a)
Red is the coolest color.
b)
Metric measurement is also known as SI.
c)
The value of a conversion factor is 1.
d)
Force equals mass times acceleration.  
86.
When you run an experiment multiple times, you conduct several
a)
attempts
b)
runs
c)
trials
d)
series
87.

What type of mixture is air (with smog) ?

a)

Homogeneous

b)

Heterogeneous

88.

What type of mixture is chocolate chip ice cream?

a)

Homogeneous

b)

Heterogeneous

89.

Which of the following are pure substances?

a)

Carbon dioxide (CO2)

b)

Milk

c)

Salt water

d)

Nitrogen (N2)

90.

Which of the following are mixtures?

a)

Sodium bicarbonate (NaHCO3)

b)

Steel (Fe + C)

c)

Salt water (NaCl + H2O)

d)

Gold (Au)

91.

Which of the following are compounds?

a)

Silver nitrate (AgNO3)

b)

Bronze (Cu + Sn)

c)

Sugar (C12H22O11)

d)

Blood

92.

Which of the following is an element?

a)

Lead metal

b)

Iron rust

c)

Aluminum foil

d)

Silver sulfate

93.

What type of matter is this?

a)

Compound

b)

Element

c)

Mixture of elements

d)

Mixture of compounds

94.

What type of matter is this?

a)

Element

b)

Compound

c)

Mixture of elements

d)

Mixture of compounds

95.

How do you identify a compound?

a)

Same type of atoms and molecules

b)

Same type of atoms different type of molecules

c)

Different type of atoms same type of molecules

d)

Different type of atoms and molecules

96.

How do you identify a compound?

a)

Same type of atoms and molecules

b)

Same type of atoms different type of molecules

c)

Different type of atoms same type of molecules

d)

Different type of atoms and molecules

97.

Which of the following are evidences or a chemical change?

a)

Change of color (unintended)

b)

Change of shape

c)

Change of size

d)

Change of odor

98.

What is the main evidence that a chemical change has occured?

a)

Change of color

b)

Production of Bubbles

c)

Production of Fire

d)

A new substance is produced

99.

Which of the following are examples of chemical properties?

a)

Conductivity

b)

Flammability

c)

Reactivity

d)

Malleability

100.

Which of the following are physical changes?

a)

Cutting your hair

b)

Fruit rotting

c)

Water boiling

d)

Dropping an alka-seltzer in water

101.

How do you identify an element?

a)

It is made of only one type of atoms

b)

It is made of different type of atoms

c)

It can be found on the Periodic Table

d)

It is represented by a chemical symbol

102.

How do you identify an element?

a)

It is made of only one type of atoms

b)

It is made of different type of atoms

c)

It can be found on the Periodic Table

d)

It is represented by a chemical symbol

103.
Something that takes up space and has mass.
a)
volume
b)
matter
c)
mass
d)
density
104.
The amount of space something takes up
a)
density
b)
volume
c)
mass
d)
matter
105.
The amount of space something takes up
a)
density
b)
volume
c)
mass
d)
matter
106.
Solids have a definite _______________.
a)
smell
b)
shape
c)
picture
d)
sound
107.
Liquid matter takes the shape of _______.
a)
a gas
b)
water
c)
a pet
d)
Its container
108.

Vaporization/ evaporation is the change of physical state from _______ to _______.

a)

gas to liquid

b)

liquid to gas

c)

solid to gas

d)

gas to solid

109.
Substance with a DEFINITE volume, but NO definite shape...
a)
solid
b)
liquid
c)
gas
110.
Substance with a DEFINITE shape and DEFINITE volume...
a)
solid
b)
liquid
c)
gas
111.
The particles in a solid are...
a)
vibrating and closely packed together
b)
vibrating and loosely packed together
c)
not moving at all
112.
Temperature measures...
a)
The amount of matter in an object.
b)
how fast or slowly molecules are moving.
c)
the amount of space an object takes up.
113.

I am ready for the midterm exam in STEM. I have reviewed all the old tests on Schoology, all the paper tests that were handed back, reviewed the exam study guided, and prayed for wisdom from the Holy Spirit.

a)

Yes

b)

No

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