WorksheetsChemistry B Midterm
Total questions: 56
Worksheet time: 2hrs 46mins
Name
Class
Date
1.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
2.
When you break a cracker into pieces it is a
a)
Chemical change
b)
Physical change
c)
Chemical Weathering
d)
Physical Weathering
3.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
4.
True or False: A PHYSICAL CHANGE does NOT create a different kind of matter.
a)
True
b)
False
5.
The change of state from a liquid to a gas
a)
evaporation
b)
condensation
6.
The change of state from a gas to a liquid
a)
condensation
b)
evaporation
7.
Randy planted a poinsettia in a pot without drainage holes. He observed that over the course of a month, many of the plant's leaves turned yellow.
What question can he ask about this observation that will lead to a testable hypothesis?
a)
What material was the pot made from?
b)
How does the amount of sunlight a plant receives affect the color of its leaves?
c)
How often do poinsettias need water?
d)
Does excess water around a plant's roots prevent it from taking in adequate nutrients?
8.
A student is conducting an experiment in which he must measure different volumes of liquids.
Which resource is required to proceed with this investigation?
a)
test tube/ petri dish
b)
Ruler/ meter stick
c)
Beaker/ graduated cylinder
d)
Eyedropper/ squeeze bottle
9.
Which of these metric units is matched correctly?
a)
Mass is measured in grams
b)
Volume is measured in meters
c)
Length is measured in liters
d)
None of the above are matched correctly
10.
Which of the following is evidence of a chemical change?
a)
Change in state
b)
No new substance is formed
c)
Bubbles forming
d)
Change in shape
11.
Which phase of matter will result when a gas changes into a liquid?
a)
freezing
b)
sublimation
c)
condensation
d)
melting
12.
When pressure increases, volume will ...
a)
stay the same
b)
increase
c)
decrease
13.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
14.
If the temperature of a gas is increased the pressure will
a)
increase
b)
decrease
15.
What is needed for a combustion reaction to occur?
a)
Nitrogen
b)
Helium
c)
oxygen
d)
iron
16.
When reactants form products, a(n) ______ has occurred.
a)
Base
b)
Acid
c)
Chemical Reaction
d)
Mixture
17.
Which one is a gas?
a)
a
b)
b
c)
c
18.
The faster an object moves, the ________ kinetic energy it has.
a)
more
b)
less
c)
none of the above
d)
all of the above
19.
No Definite Shape and No Definite Volume
a)
Gas
b)
Liquid
c)
Solid
20.
What is the first step of the scientific method?
a)
reaching a conclusion
b)
making a observation
c)
stating a theory
d)
conducting an experiment
21.
The study of the composition and structure of matter is the domain of which field of science?
a)
physics
b)
biology
c)
chemistry
d)
geology
22.
I made a/an
a)
A
b)
B
c)
C
d)
D/F
23.
Long hair in the laboratory must be
a)
tied back or kept entirely out of the way with a hair band, hairpins, or other confining device
b)
always neatly groomed
c)
held away from the experiment with one hand
d)
cut short
24.
You are heating a substance in a test tube. Always point the open end of the tube
a)
away from all people
b)
toward another classmate
c)
toward your lab partner
d)
toward yourself
25.
In a laboratory, the following should not be worn.
a)
all of the answers
b)
dangling jewelry
c)
sandals
d)
loose clothing
26.
All chemicals in the lab are to be considered dangerous
a)
True
b)
False
27.
You can measure ______ with grams.
a)
mass
b)
volume
c)
conductivity
d)
melting point
28.
Substance with a DEFINITE shape and DEFINITE volume...
a)
solid
b)
liquid
c)
gas
29.
The principle that states that if a system at equilibrium is disturbed, the reaction will proceed in one direction or another in order to reestablish equilibrium, is known as:
a)
The principle of equilibrium
b)
Priestley’s principle
c)
Le Chatelier’s principle
d)
Faraday’s principle
30.
What is the effect of changing the concentration of one of the reactants in an equation at equilibrium?
a)
the reaction will stay at equilibrium
b)
the reaction will stop
c)
the reaction will continue to completion
d)
the reaction will shift to re-establish equilibrium.
31.
For an endothermic reaction, heat can be thought of as:
a)
a reactant
b)
a product
c)
either it has no effect
d)
neither it effects both sides equally.
32.
Increasing the concentration of the reactants will:
a)
shift the reaction to the left towards the reactants, making more of the reactants.
b)
shift the equilibrium to the right towards the products, making more of the product.
c)
Have no effect on equilibrium.
33.
For the reaction...
SO2 + O2 <−> SO3
If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.
SO2 + O2 <−> SO3
If the concentration of O2 is decreased, the equilibrium of the reaction will shift ___________.
a)
left
b)
right
c)
left and right
d)
neither left nor right
34.
This symbol indicates that a reaction is ____________
a)
reversible
b)
irreversible
35.
For the reaction...
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the right, the concentration of SO3(g) will ___________.
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the right, the concentration of SO3(g) will ___________.
a)
increase
b)
decrease
c)
remain the same
d)
double
36.
For the reaction...
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the left, the concentration of SO3(g) will ___________.
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the left, the concentration of SO3(g) will ___________.
a)
increase
b)
decrease
c)
stay the same
d)
triple
37.
For the reaction...
N2 (g) + 3 H2 (g) <−> 2 NH3 (g)
If the pressure in the system is increased, which substance will increase in concentration?
N2 (g) + 3 H2 (g) <−> 2 NH3 (g)
If the pressure in the system is increased, which substance will increase in concentration?
a)
N2
b)
H2
c)
N2 and H2
d)
NH3
38.
Substance that changes the rate of a chemical reaction without being consumed in the reaction
a)
bonding
b)
catalyst
c)
chemical reaction
d)
activation energy
39.
lowers the activation energy in a reaction
a)
activation energy
b)
activation site
c)
catalyst
d)
surroundin
40.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
41.
In an endothermic reaction, heat is ...
a)
taken in
b)
given out
42.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
43.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.
a)
Warm
b)
Cold
44.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the above
45.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
46.
Temperature is...
a)
A measure of the potential energy stored in a substance
b)
The same as heat
c)
A measure of the random motions of the components of a substance
47.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
48.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
49.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
50.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
51.
Usually lowering the temperature will slow down a reaction.
a)
false
b)
true
52.
What is happening to the temperature in New York City?
a)
It is remaining about the same.
b)
It is mostly decreasing.
c)
It is mostly increasing.
d)
There is a pattern of increasing and decreasing.
53.
A student measures the diameter of a penny in what SI unit should she use?
a)
Celsius
b)
Kilogram
c)
Meter
d)
Millimeter
54.
What does the tool, metric ruler, measure?
a)
Volume
b)
Length
c)
Mass
d)
Temperature
55.
What step does every scientific experiment begin with?
a)
hypothesis
b)
question/problem
c)
procedures
d)
conclusion
56.
On a piece of paper, write a creative paragraph using terms (at least 10) from the semester about a student who is graduating from EAHS and moving on to bigger and better things in their life.
a)
Make sure name, date, class, and title are on your paper.
b)
:)
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