1.
C.
1000 kcal
In which sample are the particles arranged in a
regular geometric pattern?
D. 10,000 kcal
A. liquid HCL
7.
B.
NaCl dissolved in water
Which is a characteristic of all mixtures?
C.
N2 gas
A. They are homogeneous.
D. solid I2
B.
They are heterogeneous.
C.
Their compositions cannot be changed.
2.
D. Their compositions can be varied.
How many calories are equivalent to 35 kilocalories?
A. 0.035 calorie
8.
B.
0.35 calorie
Which material is a mixture?
C.
3,500 calories
A. water
D. 35,000 calories
3.
B.
air
C.
methane
D. magnesium
At room temperature, a 1-gram sample of which
substance in a sealed 1-liter container will occupy
the container completely and uniformly?
A. silver
B.
mercury
C.
liquid water
9.
What is the mostly likely temperature of a glass of
ice water?
A. 0°C
D. water vapor
B.
32°C
C.
100°C
D. 212°C
4.
The particles in a crystalline solid are arranged
10.
A. randomly and far apart
B.
randomly and close together
C.
regularly and far apart
Which set of properties does a substance such
as helium have?
A. definite shape and definite volume
D. regularly and close together
B.
definite shape but no definite volume
C.
no definite shape but definite volume
5.
D. no definite shape and no definite volume
An example of a heterogeneous mixture is
A. soil
11.
B.
sugar
Which quantity of heat does a kilocalorie represent?
C.
carbon monoxide
A. 100 calories
D. carbon dioxide
6.
B.
1000 calories
C.
1/100 of a calorie
D. 1/1000 of a calorie
How many kilocalories are equivalent to 10 calories?
A. 0.001 kcal
12.
B.
The mass of a solid is 3.60 grams and its volume is
1.8 cubic centimeters. Find its density.
0.01 kcal
A. 2 g/cm3
B.
2.0 g/cm3
C.
0.5 g/cm3
D. 0.50 g/cm3
B.
A.
13.
C.
D.
17.
A student investigated the physical and chemical
properties of a sample of an unknown gas and then
identified the gas. Which statement represents a
conclusion rather than an experimental observation?
The diagram represents a portion of a 100-milliliter
graduated cylinder.
A. The gas is colorless.
B.
The gas is carbon dioxide.
C.
When the gas is bubbled into limewater,
the liquid becomes cloudy.
D. When placed in the gas, a flaming splint
stops burning.
14.
A student obtained the data in the table in a
chemistry laboratory. Which of the trials seems to be
in error?
Trial
What is the reading of the meniscus?
Solubility
Temperature
(grams of KNO3/100 g of
(°C)
water)
A.
35.0 mL
B.
36.0 mL
C.
44.0 mL
D.
45.0 mL
A.
25
40
B.
32
50
C.
43
70
18.
D.
48
60
Two basic properties of the gas phase are
A. a definite shape and a definite volume
15.
During a laboratory activity, a student combined two
solutions. In the laboratory report, the student
wrote "A yellow color appeared." The statement
represents the student's recorded
A. conclusion
B.
observation
C.
hypothesis
D. inference
16.
B.
a definite shape but no definite volume
C.
no definite shape but a definite volume
D. no definite shape and no definite volume
19.
Which substance has vibrating particles in regular,
fixed positions?
A. Ca
B.
Hg
C.
Cl2
D. CaCl2 dissolved in water
Given:
Which diagram represents a mixture?
20.
A sample of water is being heated from 20°C to 30°C, and the temperature is recorded every 2 minutes. Which
table would be most appropriate for recording the data?
A.
B.
C.
D.
A. milliliters per gram
21.
The diagram represents a Celsius thermometer
recording a certain temperature.
B.
milliliters
C.
gram
D. grams per milliliter
24.
Which of the following involves mainly a physical
change?
A. gasoline powering a car engine
B.
an iron nail rusting
C.
getting a suntan
D. the formation of a pothole
25.
Two basic properties of the liquid phase are
A. a definite shape and a definite volume
Which is the best estimate of the temperature
reading of this thermometer?
B.
a definite shape but no definite volume
C.
no definite shape but a definite volume
D. no definite shape and no definite volume
A.
5°C
26.
B.
4.3°C
C.
0.3°C
D.
4°C
A student collected and recorded measurements of
the amount of carbon monoxide in the air at the
same location each day for one week. The data are
shown in the table.
22.
Blacksmiths make metal horseshoes because metals
are
A. ductile
B.
malleable
C.
lustrous
D. brittle
23.
The units of density could be
The student concluded that the amount of carbon
monoxide in the air increased and then decreased
during the week. A source of error in the student's
investigation is that the student failed to:
A. identify the days of the week
B.
identify the month
C.
1.30 g/mL
C.
collect data at the same time each day
D. 0.95 g/mL
D. state the method of measurement
29.
27.
In the diagram, the thermometer held 2 meters
above the floor shows a temperature of 30°C. The
thermometer on the floor shows a temperature of
24°C.
A pebble has a mass of 35 grams and a volume of 14
cubic centimeters. What is its density?
A. 0.4 g/cm3
B.
2.5 g/cm3
C.
490 g/cm3
D. 4.0 g/cm3
30.
What is the change in temperature between the two
thermometers?
According to the graph, what happens to the density
of a mass of air when its water vapor content
increases?
A. 2°C
A. Density decreases.
B.
6°C
B.
Density increases.
C.
3°C
C.
Density remains the same.
D. 4°C
31.
28.
The graph shows the masses and volumes of four
different earth materials, A, B, C, and D.
As shown in the diagram, an empty 1,000.-milliliter
container has a mass of 250.0 grams. When filled
with a liquid, the container and the liquid have a
combined mass of 1,300 grams. What is the density
of the liquid?
A. 1.00 g/mL
B.
1.05 g/mL
Which material has the greatest density?
A. A
B.
B
C.
C
D. D
D. an inference based on results
35.
Which laboratory equipment is correctly paired with
a unit it measures?
32.
A. metric ruler – centigrams
B.
Celsius thermometer – degrees Fahrenheit
C.
glass beaker – millimeters
D. graduated cylinder – milliliters
36.
Which condition is necessary for an experiment to
yield useful data?
The diagrams represent particles of the same type of
sedimentary rock material collected from a
streambed. The diagrams are drawn to scale. Which
inference about the density of particle A and
particle B is most accurate?
A. Similar results should be obtained when the
experiment is repeated
A. Particle A and particle B have the same
density because they are made of the same
material.
B.
C.
Particle A has a greater density than
particle B because particle A has a greater
volume.
Particle A has a greater density than
particle B because particle A has a greater
mass.
D. Particle B has a greater density than
particle A because particle B has been worn
to a smaller size.
B.
Only the expected results should be
considered each time the experiment is
performed.
C.
The hypothesis must be correct.
D. The experimental period must be short.
37.
In one of his experiments with magnetism, Oersted
noticed that a wire carrying an electric current
affected a compass needle. This statement would be
considered
A. an observation
B.
an inference
33.
C.
a hypothesis
The current knowledge of the structure of the atom
is the result of the investigations and observations of
many scientists. The work of these scientists forms a
well-accepted body of knowledge about the atom.
This body of knowledge is an example of a
D. a conclusion
A. hypothesis
B.
controlled experiment
C.
theory
D. research plan
38.
An investigation was performed to determine the
effect of temperature on the activity of a catalyst
which breaks down hydrogen peroxide releasing
oxygen. Six test tubes, each containing water and
equal concentrations of hydrogen peroxide and the
catalyst, were maintained at different temperatures.
Observations made during the investigation were
used to construct the data table below.
34.
An experimental design included references from
prior experiments, materials and equipment, and
step-by-step procedures. What else should be
included before the experiment can be started?
A. a set of data
B.
a conclusion based on data
C.
safety precautions to be used
An increase in the rate of bubbling in each of tubes 1
through 5 would most likely be noticed after
A. increasing the temperature of each tube to
80°C
B.
decreasing the temperature of each tube to
-10°C
C.
increasing the light intensity on each tube,
but not the temperature
minutes for a period of 70 minutes and the average
length of two sides was determined. The results are
shown in the data table below.
D. adding more catalyst to each tube
39.
Base your answer on the investigation described
below, the data table, and on your knowledge of
science.
A student cut a piece of potato into 8 cubes, each
measuring 5 millimeters along each edge, and placed
7 of them in a beaker containing a 25% salt solution.
One cube was removed from the beaker every 10
Which line graph below most accurately showns the
relationship between time in the salt solution and
size of the cube?
A.
C.
B.
D.
40.
The basic unit of volume in the metric system is the
B.
gallon
C.
liter
D. meter
A. kilogram
B.
gallon
43.
C.
liter
Two scientists, George and Mary, meet. Base your
answer to the question on their conversation, below,
and your knowledge of the scientific method.
D. mass
41.
The basic unit of mass in the metric system is the
A. kilogram
B.
gallon
C.
liter
D. meter
George: Here are pictures of my three children.
Mary: How nice; how old are they?
George: You’re a scientist, you figure it out.
Mary: OK, give me a hint.
George: If you multiply their ages, the result is 36.
Mary: I need more information.
George: If you add their ages, the sum is the age of
your oldest child.
Mary: I almost have it, I need one more clue.
George: The blue eyed child is the oldest.
Mary: I figured it out using the scientific method.
Mary rejected the hypothesis that all three children
are 12 years old because
42.
The basic unit of length in the metric system is the
A. kilogram
A. 12 × 12 × 12 does not equal 36
B.
triplets are rare
C.
all three children weren’t girls
D. the problem can't be solved
44.
Two scientists, George and Mary, meet. Base your
answer to the question on their conversation, below,
and your knowledge of the scientific method.
George: Here are pictures of my three children.
Mary: How nice; how old are they?
George: You’re a scientist, you figure it out.
Mary: OK, give me a hint.
George: If you multiply their ages, the result is 36.
Mary: I need more information.
George: If you add their ages, the sum is the age of
your oldest child.
Mary: I almost have it, I need one more clue.
George: The blue eyed child is the oldest.
Mary: I figured it out using the scientific method.
George: Here are pictures of my three children.
Mary: How nice; how old are they?
George: You’re a scientist, you figure it out.
Mary: OK, give me a hint.
George: If you multiply their ages, the result is 36.
Mary: I need more information.
George: If you add their ages, the sum is the age of
your oldest child.
Mary: I almost have it, I need one more clue.
George: The blue eyed child is the oldest.
Mary: I figured it out using the scientific method.
After Mary made her hypotheses about the ages of
the children, she added the ages and looked at the
sum. What part of the scientific method is this?
A. problem
B.
hypothesis
C.
observation
D. conclusion
Mary realizes that there are only 8 hypotheses to
test because
47.
A. the scientific method tells us not to do
more than 8 tests
B.
8 is Mary’s lucky number
C.
Mary only has enough time to test 8
hypotheses
D. there are only 8 possible combinations of 3
numbers whose product is 36
45.
Two scientists, George and Mary, meet. Base your
answer to the question on their conversation, below,
and your knowledge of the scientific method.
George: Here are pictures of my three children.
Mary: How nice; how old are they?
George: You’re a scientist, you figure it out.
Mary: OK, give me a hint.
George: If you multiply their ages, the result is 36.
Mary: I need more information.
George: If you add their ages, the sum is the age of
your oldest child.
Mary: I almost have it, I need one more clue.
George: The blue eyed child is the oldest.
Mary: I figured it out using the scientific method.
Mary tests each hypothesis by adding the ages of the
3 children because
A. scientists always add numbers
B.
Mary knows that the sum of the ages is the
age of the oldest child and can reject all the
hypotheses which do not produce the
correct sum
C.
the sum of the ages is 36
46.
Two scientists, George and Mary, meet. Base your
answer to the question on their conversation, below,
and your knowledge of the scientific method.
Two scientists, George and Mary, meet. Base your
answer to the question on their conversation, below,
and your knowledge of the scientific method.
George: Here are pictures of my three children.
Mary: How nice; how old are they?
George: You’re a scientist, you figure it out.
Mary: OK, give me a hint.
George: If you multiply their ages, the result is 36.
Mary: I need more information.
George: If you add their ages, the sum is the age of
your oldest child.
Mary: I almost have it, I need one more clue.
George: The blue eyed child is the oldest.
Mary: I figured it out using the scientific method.
Recalling that Mary needed more information that
the sum of the ages, only 2 possibilities had the
same sum. The children had to be either 6, 6 and 1
or 9, 4 and 1. Remembering that the oldest child has
blue eyes, Mary reasoned that the six year old twins
couldn’t be the oldest. She concluded that the ages
were 9, 4 and 1.
What part of the scientific method is this?
A. problem
B.
hypothesis
C.
observation
D. conclusion