High School Science Bowl Practice Questions

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Which of the following molecules do methanogens (read as: meth-AN-oh-gens) most often use as their final

electron acceptor in their generation of energy:

W)

hydrogen 

X)

carbon dioxide

Y)

methane

Z)

oxygen

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What is the general biological term for organisms that synthesize organic molecules from inorganic molecules

using light as an energy source?

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The conversion of solid CaSO

4

 into solid CaO and SO

2

 gas is an example of what class of chemical reaction:

W)

decomposition

X)

hydrolysis

Y)

combustion

Z)

single replacement

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What is the oxidation number of chromium in the chromate ion, or CrO

4

2–

?

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Which of the following would not supply electromotive force:

W)

transformers

X)

generators

Y)

conductors

Z)

batteries

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The nucleus of what element is the same as an alpha particle?

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What is the MOST accurate term for predicting values of data that are located between known data points on a

line graph:

W)

extrapolation

X)

extension

Y)

interpolation

Z)

cheating

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Convert 0.001 grams per cubic millimeter into kilograms per cubic meter:

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Which of the following is commonly accepted as the engine that most directly drives plate tectonic motion:

W)

mantle convection

X)

volcanic off-gassing

Y)

a molten iron core

Z)

gravitational pull of the Moon and Sun

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Although scientists are unable to obtain samples by drilling, they believe the predominant mineral in the mantle is:

W)

iron pyrite

X)

potassium feldspar

Y)

quartz

Z)

olivine

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Of which of the following is endosperm in wheat primarily composed:

W)

protein

X)

nucleic acid

Y)

carbohydrate

Z)

lipid

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From which of the following does the seed coat of angiosperm seeds typically develop:

W) integuments

X) polar nuclei

Y) nucleus

Z) cotyledons

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Ca(OH)

2

, NaOH, and Ba(OH)

2

, are all: (READ: calcium hydroxide, sodium hydroxide, and barium hydroxide…)

W)

weak bases

X)

completely ionized in water

Y)

alkali halides

Z)

standard buffers

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Which of the following compounds is most SOLUBLE in water at 10 ºC:

W)

KNO

3

 (READ: potassium nitrate)

X)

CaSO

4 

(READ: calcium sulfate)

Y)

BaSO

4

 (READ: barium sulfate)

Z)

AgBr (READ: silver bromide)

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Which of the following 4 choices MUST be true for 2 objects in thermal equilibrium:

W) they both must radiate no energy in any direction

X) they must be at the same temperature

Y) they both must have the same thermal expansion coefficients

Z) they must have the same internal energy

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 Which of the following is NOT true of the Hall effect:

W) it can be used to measure the strength of a magnetic field

X) it is a consequence of a current carrying wire in a magnetic field

Y) it was one of the first direct indications that negative charges are what move in conductors

Z) it cannot distinguish between positive and negative particles

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Which of the following is NOT true of matrices:

W) a square matrix that has an inverse is called invertible

X) a matrix does not have to have an inverse

Y) a matrix that does not have an inverse is called non-singular

Z) a matrix must be square in order to have an inverse

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Giving your answer as an ordered pair, find the solution of the system of the following 2 equations:

x = (2/3)y – 2 and x = y – 3:

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For someone standing at 43° north latitude, how many degrees above the horizon will the north celestial pole be?

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In what phase does the planet Venus appear during superior conjunction?

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In which of the following wavelengths does DNA absorb the best:

W)

3,900 angstroms 

X)

260 nanometers 

Y)

340 nanometers 

Z)

540 nanometers

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 Which of the following is closest to the diameter of a plasmodesmata (read as: PLAS-mo-dez-MAH-tah):

W)

2 angstroms 

X)

60 nanometers 

Y)

80 microns 

Z)

180 microns

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A lead chromate solution is typically what color

W) blue

X) red

Y) yellow

Z) green

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Which of the following molecules exhibits a dipole moment:

W) CH

4 

(READ: methane)

X) H

2

S (READ: hydrogen sulfide)

Y) CO

2 

(READ: carbon dioxide)

Z) SO

3

 (READ: sulfur trioxide)

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 Which of the following BEST describes Fermat’s principle:

W) light disperses in a specific medium depending on the medium’s refractive index

X) light follows the path of least time between two points

Y) the angle of incidence can be greater than the angle of reflection

Z) light always travels in the same medium at the same speed

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What is the ideal mechanical advantage of a wheel and axle, if the diameter of the wheel is 500 centimeters and the

radius of the axle is 2.5 centimeters?

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 What is the product of the following 2 values: (1) the greatest common divisor of 7 and 14; and (2) the

least common multiple of 7 and 14:

W) 21

X) 49

Y) 98

Z) 196

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 Multiply the following complex numbers, giving your answer in standard a + bi form: (6 + 3

i

)(4 + 

i

)

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 In what layer of Earth’s atmosphere do most meteors experience the most heating?

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 Name all of the following 4 layers of the atmosphere where temperature typically increases as altitude increases:

troposphere; stratosphere; mesosphere; thermosphere

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What physical property of neutrinos, which was confirmed in the past decade, contradicts earlier assumptions

that neutrinos travel at the speed of light?

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What is the name of the universal constant that relates atomic spectra of elements to that of hydrogen?

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When dissociated in water, which of the following acids has its dissociation equilibrium shifted farthest to the right:

W)

HClO 

X)

HClO

2

Y)

HClO

3

Z)

HClO

4

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Arrange the following 4 bonds in order of decreasing polarity:

Br–Br; K–Br; P–Cl; Li–F

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Order the following 3 stages from the EARLIEST to the LATEST in the evolution of a G-type star of 2 solar masses:

red giant; T-tauri; white dwarf

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 What 3 elements are most prominent in the carbon fusion cycle?

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 If a point has polar coordinates (3, π), what are the rectangular coordinates?

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 At x = -(1/2), the graph of y = x

3

 is:

W) increasing and concave up

X) increasing and concave down

Y) decreasing and concave up

Z) decreasing and concave down

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 Intestinal absorption of what vitamin is most directly dependent on intrinsic factor?

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Which of the following is the RNA complementary sequence of the following sequence: 5’CCGCGA 3’

(read as: 5-prime, CCGCGS, 3-prime)

W) 5’ UCGCGG 3’ (read as: 5-prime, UCGCGG, 3-prime)

X) 5’ GGCGCU 3’

Y) 5’ GGCGCT 3’

Z) 5’ TCGCGG 3’

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 Name the 2 different bond angles present in a molecule with octahedral geometry, such as in SF

6

:

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What is the most common name for the conformation that the ring structure of cyclohexane adopts to reach a

strain-free value?

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Which of the following is the source of alpha radiation most often used in household ionization smoke

detectors:

W) americium-241

X) uranium-238

Y) radium-226

Z) iron-59

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Pitchblende is one of the main ores of what element?

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 Which of the following are thought to form the mantle of the Earth:

W)

ultramafic rocks 

X)

felsic rocks

Y)

silicic rocks

Z)

mafic rocks

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Which of the following is the single most important factor that generally sets a northern limit to tree growth, such as

in the areas of transition between taiga and tundra in Alaska:

W) high-winter winds

X) lack of summer warmth

Y) lack of spring moisture

Z) lack of soil nutrients

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With which of the following does human interstitial fluid differ in concentration the most when compared with plasma: 

W) sodium ions 

X) potassium ions 

Y) magnesium ions 

Z) proteins

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What human organ produces the majority of immune complement proteins?

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Which of the following BEST describes the most common functions for which most transistors are used: 

W) to switch on and off or amplify electronic signals 

X) to allow electric current to pass in only one direction while increasing or decreasing the voltage 

Y) to store electrical energy 

Z) to regulate the frequency of electrical sine waves

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Which of the following is the abbreviated name of the most common field effect transistor in modern electronic

circuitry: 

W) DET 

X) MOSFET 

Y) BJT 

Z) BFET

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t

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y

,

a

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q

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o

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Which of the following would be LEAST soluble in distilled water:

W) propanoic acid

X) phosphoglyceraldehyde

Y) methanol

Z) cholesterol

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The carcinogenic effects of sunlight on skin are caused by light in which of the following wavelength ranges:

W) 280-320 nanometers

X) 320-360 nanometers

Y) 400-450 nanometers

Z) 1.0-1.5 micrometers

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Order the following 4 countries from the lowest to the highest in energy consumption per capita in 1999: Russia,

China, Japan, Germany

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Thomas Young’s double slit experiments lent strong support in his time to which of the following:

W) the particle nature of light

X) that light could be polarized

Y) the wave nature of light

Z) the wave particle duality of light

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If a string vibrates at a fundamental frequency of 120 hertz, what are the frequencies of the first and second

overtones respectively:

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Which of the following substances has the greatest

density: 

W) hexane 

X) methylene chloride 

Y) diethyl ether 

Z) ethyl acetate

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Which of the following molecules is most likely to have a zero dipole moment based on its molecular shape: 

W) PF

3 

X) H

2

O 

Y) PCl

3

Z) BeF

2

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Cape Dennison in Antarctica holds the world’s record for the highest annual average wind speeds owing to:

W) Chinook winds

X) katabatic winds

Y) Hadley cell circulation

Z) Ekman spirals

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 Order the following four geological epochs from the youngest to the oldest: Pliocene, Holocene, Oligocene,

Paleocene.

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How many significant figures are in the number 0.00750?

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Subtract the following 2 numbers and give your answer with the proper significant figures: 25.101 – 0.9608

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What star has the greatest apparent magnitude?

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What planet is known to be most like Earth in size and density?

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Upon which of the following does the mass of a body MOST directly depend: 

W) its magnetic properties 

X) how much volume it has 

Y) the amount of matter it contains 

Z) its location

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Mary and Joe are on a merry-go-round. Mary is seated near the center of rotation and Joe is on the outer

edge. Which of the following BEST describes their motion: 

W) Mary has a greater acceleration than Joe 

X) Joe has a greater acceleration than Mary 

Y) neither Mary nor Joe are accelerating 

Z) both Mary and Joe have the same acceleration

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Giving your answer in terms of π and in inches, what is the arc-length of a semi-circle whose diameter is 18 inches?

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What is the area, in square feet, of a triangle whose perpendicular height is 20 feet with a base of 12 feet?

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For individuals who are “Lactose Intolerant,” the reason for their gastric distress is the production of:

W) methane

X) acetic acid and nitrogen

Y) lactic acid and carbon dioxide

Z) acetic acid and methane

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Which acid connects the 2-deoxyribose units within every

DNA strand:

W) acetic acid

X) phosphoric acid

Y) citric acid

Z) glycolic acid

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s

b

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w

e

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n

3

0

a

n

d

5

0

?

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S

h

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A

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Find the prime factorization of 1050:

G

E

N

E

R

A

L

S

C

I

E

N

C

E

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What gas is most directly responsible for the bends or decompression sickness that divers may experience?

G

E

N

E

R

A

L

S

C

I

E

N

C

E

S

h

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A

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w

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b

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f

a

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m

a

n

b

e

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n

g

?

P

H

Y

S

I

C

S

M

u

l

t

i

p

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C

h

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Rutherford discovered that x-rays were produced by:

W) uranium when bombarded with slow neutrons

X) certain binary stars

Y) particles emitted by a cathode, which then struck an anode

Z) the sun

P

H

Y

S

I

C

S

S

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Which 3 of the following 4 are vector quantities:

velocity, acceleration, speed, magnetic field

M

A

T

H

M

u

l

t

i

p

l

e

C

h

o

i

c

e

Which of the following is NOT a Pythagorean triple:

W) 15, 20, 25 

X) 10, 24, 26 

Y) 16, 24, 30 

Z) 33, 44, 55

M

A

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H

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h

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Consider triangle ABC, where the measure of angle

 A = 20º, B =117º, and C = 43º. Arrange the 3 sides in order of increasing length:

A

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N

O

M

Y

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u

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i

p

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If a star is seen just above the eastern horizon at sunset, where would it most likely be found just

before the following sunrise: 

W) just above the eastern horizon 

X) half-way up in the eastern sky 

Y) low in the western sky 

Z) directly overhead

A

S

T

R

O

N

O

M

Y

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h

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What is the MOST common organic molecule in the atmosphere of the planet Uranus?

B

I

O

L

O

G

Y

M

u

l

t

i

p

l

e

C

h

o

i

c

e

Which of the following Orders does NOT belong to the

Class Insecta:

W) Lepidoptera

X) Diptera

Y) Isoptera

Z) Chelicerata

B

I

O

L

O

G

Y

M

u

l

t

i

p

l

e

C

h

o

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c

e

Which of the following diseases is NOT caused by bacteria:

W) strep throat

X) toxic shock syndrome

Y) scarlet fever

Z) influenza

C

H

E

M

I

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T

R

Y

M

u

l

t

i

p

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Which of the following is NOT true:

W) a reaction that requires free energy is spontaneous 

X) gases, as a group, have higher entropies than liquids 

Y) standard molar entropies of pure substances are always positive values 

Z) spontaneous processes involve non-equilibrium conditions

C

H

E

M

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T

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Y

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A racemic mixture is a solution that contains:

W) a 50:50 mixture of (+) and (-) isomers

X) greater than 50% of the (+) isomers

Y) greater than 50% of the (-) isomers

Z) only one species of isomer

G

E

N

E

R

A

L

S

C

I

E

N

C

E

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What is the MOST accurate term for predicting values of data that are

located between known data points on a line graph: 

W) extrapolation 

X) extension 

Y) interpolation 

Z) cheating

B

I

O

L

O

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Y

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h

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What is the most common term used in genetics to describe the observable physical

characteristics of an organism caused by the expression of a gene or set of genes?

B

I

O

L

O

G

Y

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h

o

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t

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w

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W

h

a

t

i

s

t

h

e

b

i

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l

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g

i

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a

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r

m

m

o

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t

o

f

t

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n

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d

f

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t

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a

c

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f

a

c

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l

l

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n

g

u

l

f

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g

a

p

a

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b

y

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x

t

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d

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p

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u

d

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p

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a

(

r

e

a

d

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:

S

U

-

d

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e

-

P

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H

-

d

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-

a

h

)

a

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?

E

A

R

T

H

S

C

I

E

N

C

E

M

u

l

t

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p

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C

h

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e

What percentage of the earth’s total volcanic activity

occurs under the ocean?

W) 30%

X) 45%

Y) 65%

Z) 90%

E

A

R

T

H

S

C

I

E

N

C

E

M

u

l

t

i

p

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C

h

o

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e

Which of the following is NOT true about the Earth’s

troposphere:

W) within the layer, temperature decreases with altitude

X) it is terminated by the tropopause

Y) it contains the jet stream

Z) within the layer, temperature increases with altitude

M

A

T

H

S

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What is the equation of a line that has a slope of 4 and a

y

-intercept of 5?

M

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Factor the following expression as completely as possible: 

x

4

 – 16

E

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C

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N

C

E

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The Sahara desert in Africa is an example of what type of

desert:

W) subtropical

X) continental

Y) rainshadow

Z) coastal

G

E

N

E

R

A

L

S

C

I

E

N

C

E

M

u

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t

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p

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e

C

h

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e

Electric appliances and tools are grounded to:

W) complete the electrical circuit

X) balance the voltage in both lines

Y) prevent the overloading of circuits

Z) prevent surface static charge buildup

P

H

Y

S

I

C

S

M

u

l

t

i

p

l

e

C

h

o

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e

What branch of mechanics customarily deals with force

and why objects move as they do:

W) kinematics

X) dynamics

Y) statics

Z) mechanics

P

H

Y

S

I

C

S

M

u

l

t

i

p

l

e

C

h

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Yellow light has a wavelength of approximately:

W) 300-350 nanometers

X) 450-500 nanometers

Y) 550-600 nanometers

Z) 650-700 nanometers

C

H

E

M

I

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T

R

Y

M

u

l

t

i

p

l

e

C

h

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e

The triple point of a substance can be represented in what

type of graphical representation:

W) Lewis diagram

X) phase diagram

Y) energy diagram

Z) time-temperature transformation diagram

C

H

E

M

I

S

T

R

Y

S

h

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Based on the acid dissociation constants of the following acids,

order the following 4 acids from the strongest to the weakest in

acid strength: HBr; HCl; HF; HI

B

I

O

L

O

G

Y

M

u

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p

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When the color of an organism alerts predators to stay

away it is technically referred to as:

W) aposematic coloration

X) homological coloration

Y) analogous coloration

Z) camouflage coloration

B

I

O

L

O

G

Y

M

u

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t

i

p

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C

h

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Which of the following is NOT a hexose:

W) mannose

X) glucose

Y) fructose

Z) xylulose (pronounced: zyle-YOU-lows)