1. Objective 1…TAKS 10th and 11th grades Home slide
TAKS questions from released tests, study guides and information booklet:
Safety, measurement, correct choice of equipment
Interpreting graphs and illustrations
Analyzing promotional labels and ads
The Scientific Method
Links to non-TAKS tutorials and quizzes
Link to 10th grade study guide
Scroll to p.251 for objective 1
Link to 11th grade study guide
Scroll to p.297 for objective 1

2. Safety/Measurements/Equipment choices
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Safety/Measurements/Equipment choices
Back to safety, etc
Understanding safety precautions
Reading measurements
Choosing equipment

3. A neutralize the acid that is reacting to produce the noxious fumes
A science class is conducting an experiment that produces noxious fumes. Because of inadequate ventilation, some students begin to feel nauseated and dizzy. The first response should be to —
A neutralize the acid that is reacting to produce the noxious fumes
B carry the reactants outside, away from other students
C leave the room and go to an area with fresh air
D spray the reaction with a fire extinguisher
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Back to safety, etc 55

4. B the acid to water slowly while stirring constantly
The safest way to dilute concentrated sulfuric acid is to add A a series of small volumes of water to the acid while stirring
B the acid to water slowly while stirring constantly
C the acid to a small volume of water and then add more water
D dilute sulfuric acid to a small volume of the concentrated acid
Home
Back to safety, etc 1

5. Acids must be handled with extreme care
Acids must be handled with extreme care. You will be shown the proper method for diluting strong acids.
Always add acid to water, swirl or stir the solution and be careful of the heat produced, particularly with sulfuric acid.
Home
Back to safety, etc AW WA

6. A chemical products can be measured and recorded as data
Laboratory equipment is cleaned and properly stored after use primarily so that —
A chemical products can be measured and recorded as data
B time is saved in setting up the next experiment
C toxic materials can be kept in the laboratory
D the possibility of contamination in the laboratory is minimized
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A clean lab prevents accidents, contamination and worry. 55

7. B avoid splashing chemicals into the face of any person
The reason for wafting or fanning a small amount of chemical vapors toward the nose as a means to detect odors in a test tube is to —
A avoid experimental error from excessive loss of mass of reactants or products
B avoid splashing chemicals into the face of any person
C protect the respiratory tract against potentially harmful vapors
D determine the relative strength of the odor before smelling directly
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8. Reactions that produce toxic gases should be performed in a —
A laboratory fume hood
B beaker with a watch glass on top
C well-ventilated area of the lab
D warm, airtight drying oven
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Back to safety, etc 15

9. A putting on safety goggles B handling the beaker with tongs
All of these procedures must be followed when using the setup shown except —
A putting on safety goggles
B handling the beaker with tongs
C securing loose clothing
D wearing rubber gloves
Always wear goggles when using glassware,
heat/fire and chemicals. And always secure loose
clothing and hair.
Home
Back to safety, etc
Latex, rubber gloves would melt. Cotton gloves handle heated glassware. 9

10. B receptacle for broken glass C laboratory apron D squeeze bottle
Home
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A safety checklist for this activity should include the presence of a proper fire extinguisher and all the following items except a —
A fire blanket
B receptacle for broken glass
C laboratory apron
D squeeze bottle
Lab aprons are used when there is fire and/or chemicals in use. 35

11. F dry it with a small flame G work in a well-ventilated area
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The ingredients described above are used to make a bonding agent. The most important safety precaution to take when applying this bonding agent is to —
F dry it with a small flame
G work in a well-ventilated area
H cover the work area with newspaper
J wear a lab coat 2

12. a hot plate overheats and catches on fire?
Home
Classification symbols for certain fire extinguishers are shown below. Which class of fire extinguisher should be used when
a hot plate overheats and catches on fire?
Back to safety, etc 24

13. Home
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14. Which safety precaution should be observed
Home
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Assume all unknown materials are toxic
until finding out differently.
Which safety precaution should be observed
while analyzing sediment from a marine
aquarium?
A Wear rubber gloves
B Use a fume hood
C Avoid using glassware
D Have a fire extinguisher nearby 15

15. Home
Back to safety, etc
Which of the following shows the length of a rubber strip measured precisely to
2.22 centimeters? – 7

16. Home
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17. Home
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47 – 38 = 9 mL
The illustration shows volume levels of a liquid in a graduated cylinder before and after a sample was removed. According to this information, what was the volume of the sample to the nearest milliliter? Record and bubble in your answer on the answer document. 20

18. What is the volume reading for the solution in the pipette? A 19.4 mL
Home
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What is the volume reading for the solution in the pipette?
A 19.4 mL
B 19.6 mL
C 20.4 mL
D 20.6 mL 55

19. Four lab groups measured the volume of acid required to neutralize a standard solution of sodium hydroxide base. Which of the groups measured the volume with the highest precision?
Home
Back to safety, etc
Use the skinniest
thing with lines on it.
Acid Base
Acid Base
Acid
Base 13
Acid Base

20. A Pour the excess crystals back into the original container
Home
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Which of the following procedures should be used in finding the mass of crystals?
A Pour the excess crystals back into the
original container
B Put the crystals on the outer part of the
balance pan for massing
C Pour wastes down the sink with plenty of
water
D Use weighing paper on the balance pan
Never put chemicals back into the original container.
They might be contaminated.
Put crystals in the center of the pan not “outer”.
Unrelated to the question of massing. 25

21. the greatest precision? A 50 mL cylinder graduated in 1 mL increments
Which of the following will allow measurement of a liquid’s volume with
the greatest precision?
A 50 mL cylinder graduated in 1 mL
increments
B 100 mL cylinder graduated in 0.5 mL
C 100 mL cylinder graduated in 1 mL
D 200 mL cylinder graduated in 5 mL
Home
Rule: Choose a ‘skinny’ glassware.
Choose the cylinder with the most lines on it,
and the smallest subparts for precision.
Back to safety, etc
50 ÷ 1 = 50 lines ml subpart
100 ÷ 0.5 = 200 lines /2 ml subpart
100 ÷ 1 = 100 lines ml subpart
200 ÷ 5 = ml subpart 21

22. S Q R T Home Subtract the lowest number of the range
Back to safety, etc
= .78
= 1.01
= .93
= .05 S Q
Subtract the lowest number of the range
from the highest number in each row. R T

23. The table shows four mass readings of one object as measured by four different balances. Which balance produced the most-consistent measurements?
A Q
B R
C S
D T
Home
Back to safety, etc 19

24. Home Range = Range = 11.5 – 5.6= Range= 9.8 – 8.2= Range = 5.9
1.6
Home
Range=
11.8 – 10.5=
1.3
Range =
11.9 – 10.2 =
1.7
Back to safety, etc
These data were gathered by four groups of students. Each group performed four trials to determine the acceleration rate of a toy car. Which group had the most-consistent data?
F Group Q
G Group R
H Group S
J Group T 16

25. 10 mL
Home
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Which of these will give the most precise measure of a 10-milliliter volume?
Rule: You use the
smallest and skinniest
device with lines on it. 22

26. Not precise for a marble Marble displacement of water
Which of the following pieces of equipment would be most appropriate for measuring the volume of a marble?
Home
Back to safety, etc
Not precise for a marble
Marble displacement of water
Marble mass
Marble diameter 35

27. F A balance and a thermometer G A pH meter and a barometer
Home
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Which set of equipment would be best to use to test the effect of temperature on solution acidity?
F A balance and a thermometer
G A pH meter and a barometer
H A balance and litmus paper
J A thermometer and a pH meter 50

28. Rule: at least double the size of the container
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Rule: at least double the size of the container
for the amount of liquid boiling.
Rule: don’t seal or close a container when boiling.
Which lab setup would be appropriate to use
in heating 100 mL of water to the boiling
point?
A A 10 mL test tube held above a Bunsen
burner
B A 200 mL beaker placed on a hot plate
C A thermal coil inside a 100 mL cylinder
D A sealed 300 mL flask in a warm-water
bath 5

29. Home
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30. Interpreting graphs & illustrations
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Interpreting graphs & illustrations
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To: Reading maps and illustrations
To: Interpreting graphs
To: Interpreting charts

31. the most likely sky conditions for Waco? A Cirrus clouds
Home
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100
200
200
200 km
The cloud conditions above are typical of locations near a warm front. According to these data, what are
the most likely sky conditions for Waco?
A Cirrus clouds
B Altostratus clouds
C Stratus clouds
D Clear skies 45

32. Home
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33. Home
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34. A 27°C B 48°C C 65°C D 80°C At which temperature do KBr and KNO3
have the
same solubility?
A 27°C
B 48°C
C 65°C
D 80°C
Home
Back to graphs 51

35. According to the graph, about how much hemoglobin would be saturated at an O2
pressure of 7.3 kPa?
A 32%
B 67%
C 89%
D 92%
Home
Back to graphs 49

36. Home
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37. The graph shows the percentage of hemoglobin that combines with carbon monoxide (CO) at various concentrations. Exposure to 400 parts per million of CO in air can cause people to experience nausea and a throbbing headache. According to the graph, about what percentage of hemoglobin is bound to CO at a CO concentration of 400 parts per million?
A 25%
B 35%
C 40%
D 55%
Home
Back to graphs 55

38. Home
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The graph shows the distance traveled by a vehicle over a certain period of time. Which segment of the graph shows the vehicle moving with the greatest speed?
A L
B M
C N
D O
The steeper the line, the faster the speed.
Horizontal lines “M” mean “parked” or no speed. 39

39. He was staying still for a while.
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1 m per 1 sec
He was staying still for a while.
2 m per 1 sec
According to this graph, what was the bicycle’s acceleration between 6 and 10 seconds?
A 0.0 m/s 2
B 0.65 m/s 2
C 1.6 m/s 2
D 6.5 m/s 2 41

40. Home

41. Home
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42. According to the graph, what is the approximate half-life of carbon-14?
A 5.7 years C 23,000 years
B 5,700 years D 1,000,000 years
Home
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100%
½ of 100% 49

43. Home
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Which graph illustrates the progress of a chemical reaction in which energy is released?

44. According to this information, what is the best prediction for the boiling point of the seven-carbon alcohol?
A 169°C
B 178°C
C 186°C
D 192°C
Home
Back to graphs 47

45. most effective chemical for controlling this pest species? A R B S C T
The graph shows the results of a study testing chemical pesticides on a pest species common to cotton plants. Different chemical pesticides were used in five different areas. According
to these results, which
of the following is the
most effective chemical
for controlling this pest
species?
A R
B S
C T
D V
Home
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A lot
Pests that
stayed alive:
stayed alive:
Pests that
A few 11

46. Home
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The graph shows the amount of carbon-14 in tissue over time. According to the graph, if a bone contains 1/8 the amount of carbon-14 that it did originally, its approximate age is —
F 5,700 years
G 11,400 years
H 17,100 years
J 22,800 years 6

47. Which graph best shows the comparison
of the elements to the total composition of the copper ore?
Home
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Use pie graphs when all the parts make a whole.

48. Home
Back to graphs 47

49. Metabolic rate means ‘rate of burning calories’
The graph shows metabolic rates for two types of fish at different environmental temperatures. Which of the following conclusions can be drawn from these data?
F Fish metabolism responds
to temperature changes.
G Metabolic rates decrease
as environmental
temperatures increase.
H Fish body temperature
results from high metabolism.
J Metabolic rates are independent
of environmental temperature.
Metabolic rate means ‘rate of burning calories’
Home
Back to graphs .
Dependent variables are put on the Y axis.
So metabolic rate (Y axis) depends on, or responds to temperature (X axis).
Independent variables are put on the X axis. 50

50. X axis Y axis Home Choose ‘gas properties’ at this link.
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Choose ‘gas properties’ at this link.
While studying the relationship between the pressure and the volume of a gas, members of a science class conducted an experiment in which they changed the pressure on a balloon and then measured the balloon’s volume. They collected the data above. Which graph correctly represents these data? 1

51. A researcher measured the net amount of carbon dioxide taken in by two species of plants at various intensities of light. According to the graph, how is Plant 1 different from Plant 2?
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52. A uses the least energy when the environmental temperature is 30°C
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The graph shows the relative basal metabolic rates of a field mouse and an anole (a type of lizard) at different temperatures. According to this information, the field mouse —
A uses the least energy when the environmental temperature is 30°C
B is able to control its body temperature
C uses less energy at 20°C than the anole does
D is unaffected by environmental temperatures 3

53. Home

54. Home

55. During a process called ventilation, a fish pumps water over its gills by opening and closing its mouth. Ventilation increases the contact between the fish’s gills and the surrounding water so that the fish is able to obtain enough oxygen.
Home

56. Which conclusion is best supported by these data?
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Which conclusion is best
supported by these data?
F Earth’s surface is composed mostly of silicon and calcium.
G Oxygen is closer to Earth’s surface than aluminum.
H There is more aluminum than calcium at Earth’s surface.
J Silicon is much heavier than iron at 12

57. Home
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7-4=3
12-7=5
31-12=19
38-31=7
The table shows the number of bubbles released by an elodea plant per minute at different light intensities. The rate of bubble release is representative of the photosynthetic rate. Which statement is supported by these data?
A The rate of photosynthesis is slowest when elodea produces 7 to 12 bubbles.
B Lower light intensity causes a higher photosynthetic rate.
C The greatest difference in photosynthetic rate is between the 75 W and 100 W light bulbs.
D Light intensity has little effect on the rate of photosynthesis of elodea. 53

58. According to the table, which workers have the greatest chance of experiencing
significant hearing
loss over time?
F Police traffic officers
G Shoe-factory workers
H Road-construction
crews
J Library desk clerks
Home
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59. Home
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Small change.
Larger change.
Container P and Container Q each were filled with 0.5 liter of water. The water was heated to 90°C. The table shows the temperatures after both containers were allowed to cool for 3 minutes. Compared to Container Q, Container P is a better —
A conductor
B absorber
C radiator
D insulator 43

60. Home
Rainfall doesn’t show a pattern.
Ozone is increasing,
as the yield is decreasing.
The table shows environmental factors and soybean production for three regions. Which of the following probably accounts for the decrease in soybean yield in Region 1?

61. F High levels of ozone damaged the soybean plants, decreasing the average yield.
G Low rainfall amounts failed to meet the plants’ moisture needs and inhibited growth.
H Poor mineral levels found in the soil in that region limited the soybean harvest.
J Higher-than-normal rainfall increased pest activity, decreasing the average yield.
Home 22

62. Home
Yield of plant materials.
Kinds of species.
Back to graphs

63. Which question could be formed based on these data?
F What types of plants have increased productivity in different habitats?
G Is there a relationship between productivity and bird diversity in a habitat?
H How does the number of birds in a population affect habitats?
J Do habitats display changes in productivity and bird diversity during different seasons?
Home
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If this were the answer, the 3rd column would not have been included.
Is there a ‘cause and effect’ between productivity and diversity?
If this had been studied, the bird diversity would have been the independent
variable and would have been the first column of the chart.
Seasons were not mentioned in the chart. 16

64. Home
Temp
increasing
Ozone
increasing
South
winds

65. D Heavy use of automobiles changes ozone levels the most.
An environmental-science company measured the ozone pollutant levels at two different locations in a metropolitan area. Which statement is best supported by these data?
A Lower fuel efficiency and northerly winds in the winter increase ozone pollution the most.
B Northwest winds in the spring transport ozone pollution into the metropolitan area.
C High summer temperatures and southerly winds contribute to high levels of ozone.
D Heavy use of automobiles changes ozone levels the most.
Home 31

66. Assuming the chart contains all energy transformations in the Earth system, how much solar radiation goes toward evaporating water?
F 40,000 terajoules
G 92,410 terajoules
H 121,410 terajoules
J 133,410 terajoules
Home
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Add these together:
And subtract from the whole:
173,410 – 133,410 =
= 133,410 52

67. According to the data in the table, about how far can a spring be expected to stretch when a
force of 3.92 N is applied?
A 10.5 cm
B 13.6 cm
C 14.0 cm
D 17.3 cm
Home
Pattern method:
= 1.96
= 2.94
= 3.92
Pattern method:
= 7
= 10.5
= 14
Ratio method:
2.94 = 10.5 ? 5

68. inference can be made from this information?
Numbers increase
from top to bottom
but don’t double.
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Numbers are
decreasing
In size.
The table shows the atomic radii of some elements in Periods 1 through 4 of the periodic table. Which
inference can be made from this information?
F Atomic radii decrease from left to right.
G Atomic radii increase from bottom to top.
H Atomic radii decrease from right to left.
J Atomic radii double from top to bottom. 52