9th Grade Practice Test
TAME Divisional STEM Competition
9th Grade Practice Test - Divisional STEM Competition
Answer the following questions by marking the BEST answer on the answer sheet.
1.
What are the next two numbers in the sequence? 1 , 4 , 10 , 19 , __ , __ , . . .
a.
2.
44
Simplify:
a.
4.
b. 22 , 28
b. 8
x–1
x+1
x–1
2x + 1
c.
d. x + 1
x–1
x+1
2x + 3
b. y = 2x + 1
c. y = x + 1
d. None of the above
b. 2 * 33
c. 1 * 66
d. none of these
3600
b. 360
c. 4500
d. 450
A lifeguard at the city pool surveyed the color of swimsuit the patrons were wearing. Out of 100 people, 56
were wearing a red swimsuit, 67 were wearing a yellow swimsuit, and 17 were wearing a swimsuit that was
neither red nor yellow. How many people were wearing a bathing suit that was red and yellow?
10
b. 20
c. 30
d. 40
b. x < -2
c. x > -2
d. x < 2
b. 10
c.
d. -100, 100
Solve for x: -4x < 3x + 14
a.
9.
b.
36 is 8% of 10% of what number?
a.
8.
d. 12
What is the prime factorization of 66?
a.
7.
c. 26
Which line is parallel to the following function: y = 2x – 1
a. 2 * 3 * 11
6.
d. 31 , 46
2x2 + x – 3
2x2 + 5x + 3
a. y = x – 1
5.
c. 31 , 36
F(x) = 6x2 – 10 ; find F(3).
a.
3.
21 , 24
x>2
Solve for x: (1/5)x2 = 20.
a.
10, 5
-10, 10
10. The population growth of a city is described by the equation y = (1.2)ex where the population is represented
by y and the year is represented x. Year 2000 is when x = 0. What should the population be in the year
2011?
a.
59,874
b. 64,272
c. 71,849
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
d. 78,546
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9th Grade Practice Test
TAME Divisional STEM Competition
11. The general equation for photosynthesis is ____________.
a.
b.
c.
d.
C6H12O6
C6H12O6
6CO2 +
6CO2 +
+ 6O2  6CO2 + 6H20
+ 6H2O  6O2 + 6CO2
6H2O  C6H12O6 + 6O2
6H2O + 6O2  CH4 + H2O
12. When a homozygous recessive white-eyed fly is crossed with a heterozygous red-eyed fly, the expected
phenotypic ratio is ___________.
a.
b.
c.
d.
9:3:3:1
75% red eyes, 25% white eyes
50% Rr, 50% rr
1:1
13. An organism’s genome consists of 35% cytosine. What percent of the genome is thymine?
a. 15%
b. 35%
c. 70%
d. can’t be determined
14. Which of is not part of the cell theory?
a.
b.
c.
d.
All cells must come from preexisting cells.
Cells are the smallest unit of life.
All living things are made of cells.
All cells must have nuclear DNA.
15. Abscisic acid most likely ________________.
a.
b.
c.
d.
Inhibits growth
Opens the stomata
Promotes growth
Promotes seed germination
16. Which of the following cells is derived from a B cell?
a. Cytotoxic T-cell
b. Memory cell
c. Helper T-cell
d. Primary stem cell
17. Which of the following best describes a consumer?
a. Anabaena
b. Autotroph
c. Heterotroph
d. Plant
18. Where are the adrenal glands located?
a.
b.
c.
d.
Behind the hypothalamus
Near the kidneys
Attached to the duodenum
Below the ovaries
19. Which of the following organisms exhibit metamorphosis in their life cycle?
a. Amphibians
b. Arthropods
c. Humans
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
d. Plants
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9th Grade Practice Test
TAME Divisional STEM Competition
20. When crossing a homozygous dominant red rose with a homozygous recessive white rose, the botanist created
100% pink roses. Which of the following best explains this scenario?
a.
b.
c.
d.
Multiple alleles
Codominance
Incomplete dominance
Mendelian genetics
21. What is the equation of a line that passes through the two points A(0,4) and B(5,14)
a. y = 2x + 4
b.
y = 2x + 14
c.
y = -2x
d. y = 2x
22. Factor the following polynomial. 12x2 – x – 63
a. (4x + 9)(3x – 7)
b. (4x + 9)(3x + 7)
c. (4x – 9)(3x – 7)
d. (4x – 9)(3x + 7)
23. What are the next two numbers in the following sequence: 2 , 5 , 4 , 7 , 6 , 9 , ___ , ___ . . .
a. 10 , 13
b.
8 , 10
c.
8 , 11
d. 12 , 11
24. BAC = ( x – 1) and CAD = ( 2x + 5). If BAD = 70°, then what are the measurements for BAC
and CAD ?
a.
b.
c.
d.
21° , 49°
20° , 50°
45° , 45°
30° , 60°
25. Two lines that are coplanar and do not intersect are called what?
a.
perpendicular
b.
parallel
c.
skew
d. opposite
26. Point W is on the bisector of XYZ . What statement is true about point W?
a. Point W is equidistant from the two sides of the angle.
b. Point W is closer to XY
c. Point W is closer to YZ
d. None of the above
27. If EC || DB and ADB  38° , what does AEC equal?
a.
b.
c.
d.
142°
52°
90°
38°
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
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9th Grade Practice Test
TAME Divisional STEM Competition
28. What is the measurement of  y?
a.
b.
c.
d.
82°
90°
80°
86°
29. Adjacent angles in a parallelogram are always what?
a.
congruent
b. complementary
c. supplementary
d. vertical
30. How many lines of symmetry does a square have?
a.
2
b.
4
c.
6
d. 8
31. Which scientist(s) is/are credited with the fluid mosaic model?
a.
b.
c.
d.
Meselson and Stahl
Sanger
Singer and Nicholson
Watson and Crick
32. Which molecule was originally believed to carry the genetic code?
a. Protein
b. Lipid
c. Carbohydrate
d. Nucleic acid
33. The stage of the cell cycle that is the lengthiest is ______________.
a. Cytokinesis
b. Interphase
c. Metaphase
d. Mitosis
34. Which of the following plant families is most involved with nitrogen fixation?
a. Apiaceae
b. Fabaceae
c. Laminaceae
d. Rosaceae
35. Which of the following ion-exchange systems is most linked with the opening and closing of stomata?
a.
b.
c.
d.
Calcium channels
ADP + P production
Sodium-potassium pump
Sodium-chlorine pump
36. Which of the following cells have axon and dendrite components?
a. Xylem
b. Lymphocytes
c. Pancreatic cells
d. Neurons
37. Which of the following is not an action of the sympathetic system?
a.
b.
c.
d.
Speeds up heart beat
Constricts arteries
Slows down peristalsis
Relaxes urinary bladder
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
Page 4 of 10
9th Grade Practice Test
TAME Divisional STEM Competition
38. Gram-stains determine the relative amounts of _____________ in bacterial cell walls.
a. Polypeptides
b. 1,4-glucaldehydes
c. Peptidoglycan
d. Cellulose
39. Which of the following is a vestigial structure found in humans?
a. Appendix
b. Kidney
c. Tonsil
d. Large intestine
40. A person with homozygous A blood type cannot have a child who has ____________.
a.
b.
c.
d.
A blood type
AB blood type
Both AB or O blood type
Both O or B blood types
41. Assume the two triangles are similar. What
is the measurement of x?
a.
b.
c.
d.
2
28
2.5
13
42. Assume the two triangles in problem 41 are similar. What is the measurement of y?
a. 2
b.
28
c.
3
d. 2.5
43. Find the probability that a point will be selected from the non-shaded region.
a.
9
25
b.
16
25
c.
9
16
d.
25
16
44. What is the volume of a cylinder with a radius of 2 in. and a height of 10 in?
a.
125.7 in.3
b. 62.8 in.3
c. 12.6 in.3
d. 100 in.3
45. If angle ABC is equal to 137°, then what is the measurement of angle GEH?
a.
b.
c.
d.
43°
133°
223°
137°
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
Page 5 of 10
9th Grade Practice Test
TAME Divisional STEM Competition
46. Write an equation in standard form of the line that passes through (0,10) and has a slope of 1/4.
a.
y = 4x + 10
b. y = 1/4x + 10
c.
4x + y = 10
d. x – 4y = -40
47. Simplify: (x + 1)(2x2 + x – 1).
a.
48.
x3 + 2x2 – 1
Express the following in exponential form:
a.
x 2 3 yz 4 3
c. 2x3 – 3x2 – 1
b. 2x3 + x2 + 1
b.
3
xyz4 3
d. 2x3 + 3x2 – 1
x2 y3 z 4
c.
x 2 3 yz
d.
xyz
49. Simplify: (x + 1)(x + 2)(2x – 1)
a.
2x3 + 5x – x – 2
b. 2x3 + 5x2 + x – 2
c. x3 – 5x + 2
d. 2x3 + 5x2 – x + 2
50. It takes Billy 4 hours to do 100 math problems. If Billy spent 10 hours doing math problems of the same
difficulty, how many math problems would Billy complete?
a.
250
b.
25
c. 150
d. 250
51. Which of the following acts will increase the speed of a reaction?
a.
b.
c.
d.
Increasing heat
Decreasing heat
Adding an enzyme
Answers A and D
52. What are the byproducts of fermentation in animals?
a.
b.
c.
d.
Adenosine diphosphate
Carbon dioxide
Lactic acid
Ethyl alcohol
53. Which cell is most likely involved in the transpiration of water in a tree?
a.
b.
c.
d.
Sieve cell
Companion cell
Vessel
Pith
54. Which of the following spectrums are absorbed during light reactions?
a. 680 and 700 nm
b. 700 and 710 nm
c. 500 and 600 nm
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
d. 420 and 680 nm
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9th Grade Practice Test
TAME Divisional STEM Competition
55. Trisomy 21 produces the condition known as ____________.
a.
b.
c.
d.
Turner’s syndrome
Down syndrome
Klinefelter’s syndrome
Testicular feminization syndrome
56. Prothallus is found most commonly in which of the following organisms?
a. fern
b. ivy
c. penny wort
d. wheat
57. The codon, which signals the beginning of translation, is _____________.
a. Methionine
b. AUG
c. TAC
d. UAC
58. Facultative aerobes are microorganisms that ________________.
a.
b.
c.
d.
Require oxygen
Lyse in the presence of oxygen
Does not react to the presence or the lack of oxygen
Reacts only to sulfur-based compounds
59. The part of the solution that dissolves is ________.
a. Solute
b. mass
c. solvent
d. density
60. The only force that can both repel and attract is the __________.
a. strong force
b. gravity
c. electromagnetic force d. weak force
61. The formula for the population growth of Sandra’s ant farm is y  2.5x . y is the population after x years.
How long will it take for Sandra’s ant farm to reach a population of 300?
a. 5.7 years
b. 6.2 years
c. 0.9 years
d. 5.8 years
62. The initial value of a new car is $20,000. Bob has owned the car for three years and the dealership said the
car is now worth $12,000 dollars. Assuming the rate of depreciation is constant, what percentage has the car
depreciated each year?
a. 12%
b. 13.5%
c. 14.8%
d. 15.7%
b. 0.32
c. 0.68
d. 1.35
63. Solve for x: e5 x  5
a. 0
64. What is the x-intercept of the following equation: y = 5x + 10?
a. 10
b. -10
c. 2
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
d. -2
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9th Grade Practice Test
TAME Divisional STEM Competition
65.
x2
3
Simplify:
x2
6
a. x – 2
b. 6
c. 2
d. 3
66. The probability of event A happening, P(A), is 0.4 and the probability of event B happening, P(B), is 0.6.
If event A and event B are independent, what is the probability of them both happening, P(A and B)?
a. 0.24
b. 1.0
c. 0.5
d. 0.75
67. Write the equation of the line in standard form containing the points (5, 3) and (–2, 8).
a. 5 x  7 y  46
b. 7 x  5 y  50
c. 5 x  7 y  50
d. 5x  7 y  46
68. Identify the set that is not a function.
a.
b.
c.
d.
{(2, 3), (-1, 0), (6, 4)}
{(–6, –5), (0, 5), (4, –5)}
{(3, –1), (3, 2), (2, 5)}
{(–3, 3), (–1, 6), (0, 9)}
69. Let k ( x)  3x  1, h( x)  2 x  5, g ( x)  x2  x . Find h(k ( g (3))).
a. 175
70.
b. 1
At what point(s) does the graph of f ( x) 
a. (-1,1)
c. 33
d. 210
x²+x-6
intersect its horizontal asymptote?
x  3x  4
2
b. (1,-1)
c. (-4,0)
d. (1,0)
c. shared
d. transferred
71. In covalent bonding, electrons are __________.
a. gained
b. lost
72. The distance between two crests on a wave is called __________.
a. wavelength
b. speed
c. frequency
d. amplitude
c. amplitude
d. interference
73. Pitch of sound depends on ________.
a. frequency
b. overtones
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
Page 8 of 10
9th Grade Practice Test
TAME Divisional STEM Competition
74. Which of the following is the correct equation for momentum?
a.
b.
c.
d.
momentum = mass * velocity
momentum = mass * volume
momentum = mass * density
momentum = volume * density
75. The angle of reflection ________.
a.
b.
c.
d.
equals the angle of incidence
is greater than the angle of incidence
is less than the angle of incidence
is always 90°
76. Which of the following has the greatest penetrating ability?
a. X-rays
b. gamma rays
c. radio waves
d. ultraviolet rays
77. As temperatures increase, enzyme activity decreases. What is the most likely explanation for this?
a.
b.
c.
d.
Heat slows down the activity of any molecule.
The enzyme becomes denatured.
The system does not require an enzyme.
Temperature has little bearing on activity. The results may not be accurate.
78. The Davson-Danielli model differs from the fluid mosaic model in that ___________.
a. The proteins are embedded in the fluid mosaic model whereas the proteins are to the exterior of the
phospholipids in the Davson-Danielli model.
b. There are no phospholipids in the Davson-Danielli model.
c. The phospholipids in the fluid mosaic model have the fatty acid tails facing together, whereas the fatty
acid tails away from each other in the Davson-Danielli model.
d. The Davson-Danielli model explains the cellular membrane of plant cells, whereas the fluid mosaic
model explains the membranes of animal cells.
79. Which of the following best describes the origin of eukaryotes?
a. Mutation
b. Endosymbiosis
c. Parasitism
d. Mimicry
80. Which of the following phyla does not have coelomates?
a. Aschelminthes
b. Annelida
c. Arthropoda
Copyright Texas Alliance for Minorities in Engineering (TAME) 01.19.2017
d. Mollusca
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9th Grade Practice Test
TAME Divisional STEM Competition
Answer key
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
D
A
A
B
A
C
D
C
C
C
C
D
A
D
A
B
C
B
A
C
A
A
C
A
B
A
D
A
C
B
C
A
B
B
C
D
A
C
A
D
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
B
D
A
A
D
D
D
A
B
A
D
C
C
A
B
A
B
C
C
C
B
D
B
D
C
A
A
C
C
A
C
A
A
A
A
B
B
A
B
A
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