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In a gaseous mixture of hydrogen and oxygen, the faster molecules on average are
A) hydrogen.
B) oxygen.
C) both the same
D) not enough information
Answer:
Basaltic volcanic eruptions tend to be
A) slow moving and highly viscous.
B) very fluid and highly viscous.
C) slow moving with a low viscosity.
D) very fluid and have a low viscosity.
Answer:
The headlights, radio, and defroster fan in an automobile are connected in
A) series.
B) parallel.
C) order of energy efficiency.
Answer:
When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard,
the speed of the skateboard
A) decreases.
B) increases.
C) neither decreases nor increases.
Answer:
How can thorium be used for nuclear energy when it is not fissionable?
A) Thorium can be used as a fuel for nuclear fusion reactors.
B) Thorium has strong nuclear shielding properties, which enhances the chain reaction.
C) Thorium can actually be fissioned with sufficient pressure and temperature.
D) The thorium can easily be converted to U-233, which is fissionable.
Answer:
Convergent boundaries are areas of
A) compressional forces that crunch the crust and generate a spreading center.
B) tensional forces that stretch the crust and generate a spreading center.
C) crustal formation.
D) plate collision.
Answer:
Wave interference occurs in
A) transverse waves.
B) longitudinal waves.
C) both of the above
D) none of the above
Answer:
Compared with the voltage input to a transformer, the voltage output can be
A) greater.
B) less.
C) greater or less.
Answer:
As an air parcel expands and cools, or compresses and warms, with no interchange of
heat with its surroundings, the situation is called
A) temperature equilibrium.
B) an adiabatic process.
C) stable equilibrium.
D) lapse rate.
Answer:
A difference between electric and gravitational forces is that electric forces include
A) separation distance.
B) repulsive interactions.
C) the inverse-square law.
D) infinite range.
E) none of the above
Answer:
Compared to the event horizon, the photon sphere of a black hole is
A) nearer the singularity.
B) farther from the singularity.
C) at the same location.
Answer:
The photo on page 193 shows Lillian's hair standing out when her hand is on a charged
Van de Graaff generator, which illustrates
A) strands of hair become charged and repel one another.
B) a high voltage is communicated to strands of hair.
C) strands of hair orient themselves in an electric field.
D) the effect of electrons and protons deposited on her hair.
Answer:
If the path of polar wandering found from two continents are not the same, then we can
say that
A) Earth's magnetic history has been very complex.
B) at least one of the continents has moved.
C) our radioactive dating techniques have been inaccurate.
D) the continents have always been widely separated.
Answer:
Compared to microtechnology, nanotechnology focuses on a scale that is about
A) 10 times smaller.
B) 100 times smaller.
C) 1000 times smaller.
D) a million times smaller.
Answer:
How many more electrons can fit within the valence shell of a hydrogen atom?
A) 1
B) 2
C) 7
D) 0
Answer:
Which of the following is not an unsaturated molecule?
A) a
B) b
C) c
D) d
E) All of the above are unsaturated.
Answer:
The Earth's magnetic field is attributed to the
A) flow of molten liquid in Earth's inner core.
B) flow of molten fluid in Earth's outer core.
C) movement of lithospheric plates in the outer mantle.
D) movement of lithospheric plates at Earth's surface.
Answer:
As water flows around a bending and looping river channel, maximum flow speed and
erosion occurs
A) at a point bar.
B) on the outside of each bend.
C) on the inside of each bend.
D) on both the outside and inside of the bending channel.
Answer:
When salt is introduced to water, the temperature at which freezing occurs is
A) quite unaffected.
B) lowered.
C) increased.
D) dependent on the shape of salt and ice crystals
Answer:
To date a rock thought to be many millions of years old, you should not use the decay
of
A) uranium to lead.
B) potassium to argon.
C) carbon-14.
Answer:
In the Northern Hemisphere, air rushing into a low-pressure region
A) spirals in a clockwise direction.
B) sinks.
C) spirals in a counterclockwise direction.
D) rises.
Answer:
Warm air rises because faster moving molecules tend to move to regions of less
A) density.
B) pressure.
C) both of these
D) none of the above
Answer:
How did Mr. Hubble calculate the age of the universe?
A) by measuring the rate of expansion of the universe
B) by looking at the age of the oldest stars
C) by measuring the redshift of stars within 360 degrees of the center of our galaxy
D) by measuring the rate of radioactive decay within the farthest galaxies
Answer:
Which of these is the smallest?
A) 1 Celsius degree
B) 1 kelvin
C) 1 Fahrenheit degree
D) all are the same
Answer:
Why are smaller nuclei such as carbon-14 often radioactive? (carbon-12 is the most
common and most stable form of carbon.)
A) The attractive force of the nucleons has a limited range.
B) The isolated neutron is not stable and will undergo spontaneous transformation into
a proton and an electron.
C) Hmmm... mysterious are the ways of the force.
D) both A and B
E) none of the above
Answer:
A wave travels an average distance of 1 m in 1 s with a frequency of 1 Hz. Its amplitude
is
A) less than 1 m.
B) 1 m.
C) more than 1 m.
D) not enough information
Answer:
One liter of water has a mass of
A) 1 kg.
B) 1 N.
C) both of these
D) none of the above
Answer:
The electric field in the wires of an ac circuit
A) changes via the inverse square law.
B) changes direction with time.
C) remains relatively constant.
D) is nonexistent.
E) none of the above
Answer:
Refraction of sound can occur in
A) air.
B) water.
C) both of these
D) none of the above
Answer:
The ________ is what needs to be overcome in a reaction so that it can proceed to the
products.
A) activation energy
B) catalyst
C) entropy
D) thermodynamics
E) bond energy
Answer:
A boat loaded with wood floats in a swimming pool. When the wood is thrown
overboard, the pool level
A) rises.
B) falls.
C) remains unchanged.
Answer:
