HS Sample Set 6, Round 3 from NSB
Female insects usually lay their eggs near which of the following? W) Light X) Shade Y) Food Z) Water
W: W) Light
X: X) Shade
Y: Y) Food
Z: Z) Water
Answer: Y) Y) Food
Which of the following biological molecules most directly enables the structural compartmentalization required for cellular respiration and photosynthesis? W) Amino acids X) Phospholipids Y) Glycogen Z) Cholesterol
W: W) Amino acids
X: X) Phospholipids
Y: Y) Glycogen
Z: Z) Cholesterol
Answer: X) X) Phospholipids
Which Greek scientist discovered that, when an object is immersed in a fluid, there is a buoyant force acting upward on the object equal to the weight of the displaced fluid?
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Which of the following is true for a cyclist applying her brakes while traveling west on a straight path? W) Her acceleration is zero X) She accelerates to the east Y) She accelerates to the west Z) She accelerates both to the east and the west
W: W) Her acceleration is zero
X: X) She accelerates to the east
Y: Y) She accelerates to the west
Z: Z) She accelerates both to the east and the west
Answer: X) X) She accelerates to the east
In which of the following ways would oxygen’s electrons fill the 3p subshells? W) 1 pair, 2 unpaired X) 1 pair, 1 unpaired Y) 2 pairs Z) 3 pairs
W: W) 1 pair, 2 unpaired
X: X) 1 pair, 1 unpaired
Y: Y) 2 pairs
Z: Z) 3 pairs
Answer: W) W) 1 pair, 2 unpaired
What gaseous organic compound is made when ethanol is heated in a concentrated solution of sulfuric acid?
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Mechanical weathering is one type of weathering, what is the other?
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For the June solstice, which of the following statements is NOT true? W) The northern hemisphere experiences the day with the longest period of sunlight X) There are 24 hours of sunlight in the Arctic Circle Y) Earth is further from the Sun than it is at the winter solstice Z) The Sun is directly overhead at noon in the Arctic Circle
W: W) The northern hemisphere experiences the day with the longest period of sunlight
X: X) There are 24 hours of sunlight in the Arctic Circle
Y: Y) Earth is further from the Sun than it is at the winter solstice
Z: Z) The Sun is directly overhead at noon in the Arctic Circle
Answer: Z) Z) The Sun is directly overhead at noon in the Arctic Circle
How many distinct diagonals does a pentagon have?
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The polynomial $$p(x) = x^4 + 5x^3 - 2x^2 - 24x$$ has a zero at $$x = 2$$. Factor $$p$$ completely.
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Which of the following describes the purpose of the ground connection on a common power outlet? W) Provide a zero potential reference X) Remove excess heat from the transmission system Y) Give a low resistance path for short circuits to travel through Z) Act as a small current source to prevent corrosion
W: W) Provide a zero potential reference
X: X) Remove excess heat from the transmission system
Y: Y) Give a low resistance path for short circuits to travel through
Z: Z) Act as a small current source to prevent corrosion
Answer: Y) Y) Give a low resistance path for short circuits to travel through
If a solar panel produces energy directly proportional to the flux of incident photons, what is the best orientation it can have, relative to the line from the Earth to the Sun?
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Which of the following statements is NOT true about spike moss? W) They do not have true roots X) They have a well-developed vascular system Y) They are widely distributed in all parts of the world Z) Their leaves are spore-bearing
W: W) They do not have true roots
X: X) They have a well-developed vascular system
Y: Y) They are widely distributed in all parts of the world
Z: Z) Their leaves are spore-bearing
Answer: X) X) They have a well-developed vascular system
What is the term for the organic substance that consists of a dendritic network polymer of phenylpropene units and binds the cells, fibers, and vessels that constitute wood?
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Pascal’s law governs the actions of forces in which of the following? W) Gases X) Solids Y) Incompressible fluids Z) A vacuum
W: W) Gases
X: X) Solids
Y: Y) Incompressible fluids
Z: Z) A vacuum
Answer: Y) Y) Incompressible fluids
What current, in amperes, is carried in a lightning stroke that lasts 0.5 seconds and transfers 100 coulombs of charge?
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In a flame test on an unknown compound, the flame is violet. What element is likely to be in the compound?
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Which of the following anhydrous compounds has the lowest melting point? W) Aluminum chloride X) Calcium chloride Y) Copper (II) chloride Z) Lead (III) chloride
W: W) Aluminum chloride
X: X) Calcium chloride
Y: Y) Copper (II) chloride
Z: Z) Lead (III) chloride
Answer: W) W) Aluminum chloride
What term is used to describe the advance of desert conditions into formerly non-desert areas?
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The Intertropical Convergence Zone is NOT characterized by which of the following? W) Divergence X) Uplift Y) High cloud cover Z) Heavy precipitation
W: W) Divergence
X: X) Uplift
Y: Y) High cloud cover
Z: Z) Heavy precipitation
Answer: W) W) Divergence
What is the surface area of a cube with volume 8?
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In terms of $$x$$ and in standard polynomial form, what is the volume of a right rectangular prism with dimensions $$(x + 4), (x + 1), (x + 6)$$?
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Which of the following uses stored electricity and is required to get a gasoline-powered car's engine going? W) Catalytic converter X) Starter motor Y) Fuel rail Z) Alternator
W: W) Catalytic converter
X: X) Starter motor
Y: Y) Fuel rail
Z: Z) Alternator
Answer: X) X) Starter motor
Most coals of the softer varieties are forms of which of the three major rock types?
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Which of the following best describes blood? W) It is a specialized type of cell found in blood vessels X) It is a type of cell formed in the bone marrow Y) It is a kind of connective tissue in which red and white blood cells are suspended in plasma Z) It is a kind of epithelial tissue
W: W) It is a specialized type of cell found in blood vessels
X: X) It is a type of cell formed in the bone marrow
Y: Y) It is a kind of connective tissue in which red and white blood cells are suspended in plasma
Z: Z) It is a kind of epithelial tissue
Answer: Y) Y) It is a kind of connective tissue in which red and white blood cells are suspended in plasma
Valproic acid and trapoxin are inhibitors of what class of enzymes that regulate gene expression by altering chromatin accessibility?
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DO NOT ACCEPT:
Which of the following statements about the Moon best describes why we only see one side of the Moon from Earth? W) It does not rotate X) It has a side that is always dark Y) It does not revolve Z) It has the same period for rotation and revolution
W: W) It does not rotate
X: X) It has a side that is always dark
Y: Y) It does not revolve
Z: Z) It has the same period for rotation and revolution
Answer: Z) Z) It has the same period for rotation and revolution
Which of the following elements CANNOT be a source of fuel in nuclear fusion? W) Iron X) Oxygen Y) Nitrogen Z) Carbon
W: W) Iron
X: X) Oxygen
Y: Y) Nitrogen
Z: Z) Carbon
Answer: W) W) Iron
Which of the following statements best describes the thermodynamic effect of an enzyme on the reaction it catalyzes? W) The energy level of the reactants is decreased in the presence of the enzyme X) The activation energy of the reaction is decreased Y) The activation energy of the reaction is increased Z) The $\Delta G$ between products and reactants is decreased
W: W) The energy level of the reactants is decreased in the presence of the enzyme
X: X) The activation energy of the reaction is decreased
Y: Y) The activation energy of the reaction is increased
Z: Z) The $\Delta G$ between products and reactants is decreased
Answer: X) X) The activation energy of the reaction is decreased
What recessive, life-threatening disorder affects the cells that produce mucus, sweat, and digestive juices, rendering secretions thick and sticky?
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The two leaves of an electroscope repel each other and stand out at an angle. What force balances the electrical force so the leaves don’t stand out farther?
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A block of wood, when floating in water, displaces 300 cubic centimeters of water. When completely submerged, the block displaces 400 cubic centimeters of water. What is the specific gravity of the block?
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A nitrogen atom present in the backbone of a polypeptide is part of which of the following functional groups? W) A primary amine X) A secondary amine Y) A tertiary amine Z) An amide
W: W) A primary amine
X: X) A secondary amine
Y: Y) A tertiary amine
Z: Z) An amide
Answer: Z) Z) An amide
Which of the following is the final product of purine metabolism excreted in the urine? W) Urea X) Uric acid Y) Ammonia Z) Ammonium
W: W) Urea
X: X) Uric acid
Y: Y) Ammonia
Z: Z) Ammonium
Answer: X) X) Uric acid
What is the most common element in Earth’s crust?
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Which of the following is NOT a characteristic of the mixed layer of the ocean? W) Relatively stratified in the vertical X) In direct contact with the atmosphere Y) Stirred by winds and convection Z) Varied depth with latitude and season
W: W) Relatively stratified in the vertical
X: X) In direct contact with the atmosphere
Y: Y) Stirred by winds and convection
Z: Z) Varied depth with latitude and season
Answer: W) W) Relatively stratified in the vertical
For what values of $$x$$ is the function $$f(x)=\frac{x^2}{x^2 - 4x + 4}$$ NOT defined?
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Which of the following inequalities has NO solutions? W) 7x + 4 > 3 X) |x – 1| > -10 Y) |x + 3| < -2 Z) -100x + 5 ≥ 8
W: W) 7x + 4 > 3
X: X) |x – 1| > -10
Y: Y) |x + 3| < -2
Z: Z) -100x + 5 ≥ 8
Answer: Y) Y) |x + 3| < -2
What energy barrier must a chemical reaction pass in order to proceed?
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One proposed geoengineering mechanism that could be used to mitigate increased atmospheric carbon dioxide levels is called iron seeding and involves spreading large quantities of iron over the surface of the ocean. What is the name of the organism that would grow as a result, leading to carbon sequestration?
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Which of the following choices is NOT a source of new genetic combinations? W) Mitosis X) Fertilization Y) Mutation Z) Meiosis
W: W) Mitosis
X: X) Fertilization
Y: Y) Mutation
Z: Z) Meiosis
Answer: W) W) Mitosis
Which of the following parts of B and T cells bind to antigens? W) Variable region X) Heavy chain Y) Alpha chain only Z) Disulfide bridge
W: W) Variable region
X: X) Heavy chain
Y: Y) Alpha chain only
Z: Z) Disulfide bridge
Answer: W) W) Variable region
What force does a charged particle moving through a magnetic field experience that is perpendicular to the direction the particle is traveling?
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What is the mass, in kilograms, of a 2 kilogram rock on a planet with a gravitational acceleration of 8.2 meters per second squared?
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At -78º Celsius, dry ice changes directly from a solid to a gas. What is this process called?
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Which of the following is the formula for n-Octadecanoic acid? W) C6H12O6 X) C18H36COOH Y) C17H35COOH Z) C16H32COOH
W: W) C6H12O6
X: X) C18H36COOH
Y: Y) C17H35COOH
Z: Z) C16H32COOH
Answer: Y) Y) C17H35COOH
In what compass direction would the magnetic north pole of your compass point during a period in which the Earth’s magnetic field was reversed?
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Which of the following best describes why Neptune is blue? W) A sub-surface ocean below a layer of ice X) Absorption of light by methane in its atmosphere Y) Blue-shifted due to its orbit Z) Hydrocarbon haze
W: W) A sub-surface ocean below a layer of ice
X: X) Absorption of light by methane in its atmosphere
Y: Y) Blue-shifted due to its orbit
Z: Z) Hydrocarbon haze
Answer: X) X) Absorption of light by methane in its atmosphere
If $$\ln(x^3) = 6$$, what is $$\ln(x^2)$$?
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If $$f(x) = 4x^3 - 4x^2 + 10$$, then what is $$f(-2)$$?
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