When the voltage across a steady resistance is doubled, the current
A) is half.
B) remains the same.
C) is doubled.
D) is quadrupled.
Answer:
Evidence for dark matter is exhibited by the
A) relatively similar speeds at which all stars in a galaxy orbit the galactic nucleus.
B) speed at which galaxies orbit one another within clusters.
C) degree to which galaxy clusters exhibit gravitational lensing effects.
D) All of the above
Answer:
Which of the following are not produced by streams?
A) floodplains
B) deltas
C) moraines
D) alluvial fans
Answer:
Compressive forces cause the crust to
A) buckle and fold, thereby shortening the crustal surface.
B) buckle and fold, thereby lengthening the crustal surface.
C) stretch and pull, thereby shortening the crustal surface.
D) break and fracture, thereby lengthening the crustal surface.
Answer:
The predominant gas in the atmosphere of Venus is
A) oxygen.
B) nitrogen.
C) water vapor.
D) carbon dioxide.
E) methane.
Answer:
The materials that compose most of Titan are completely different than those that
compose Earth. Therefore, what were scientist surprised to see from space-probe
images in a 2005 landing?
A) some indications that an ancient civilization may have inhabited Titan approximately
500,000 years ago
B) a landscape similar to Earth’s
C) an utterly alien landscape, unlike anything seen on Earth
D) the image of a man’s face on an equatorial mountain range
Answer:
If a radioactive element has a half-life of 5760 years, and the amount of parent material
remaining is one-fourth of the original amount, the specimen is about
A) 11,520 years old.
B) 17,280 years old.
C) 23,040 years old.
D) 28,800 years old.
Answer:
A sheet of red paper will look black when illuminated with
A) red light.
B) yellow light.
C) magenta light.
D) cyan light.
E) none of the above
Answer:
Based on the information given in the following diagrams, which substance has the
lower boiling point: one made from molecule A or one made from molecule B?
A) molecule A because it is the first to transform into a liquid
B) molecule B because it is first to transform into a liquid
C) molecule A because it remains in the gaseous phase
D) molecule B because it remains in the gaseous phase
Answer:
The unit kilowatt-hour is a unit of
A) energy.
B) momentum.
C) power.
D) time.
Answer:
The universe as a whole is
A) curved.
B) flat.
C) the shape of a saddle.
D) has yet to be determined, although most astrophysical data points to a flat universe.
Answer:
Radio waves travel
A) always much faster than sound waves.
B) usually at the same speed as sound waves.
C) slower, on average, than sound waves.
D) at a speed that depends on frequency.
Answer:
Which of the following two stick structures are structural isomers?
A) a and b
B) a and c
C) b and c
D) b and d
E) none of the above
Answer:
The greater the hydraulic gradient the
A) slower the flow.
B) faster the flow.
C) greater the porosity.
D) less the permeability.
Answer:
Which of the following statements best describes what is happening in a water
softening unit?
A) Thehard ions in water are exchanged for ions that do not interact as strongly with
soaps.
B) The hard ions are all trapped in the softener, which filets out all the ions.
C) The ions in the water softener are softened by chemically bonding with sodium.
D) The sodium is removed from the water, making the water interact less with the soap
molecules.
E) none of the above
Answer:
Melting snow tends to
A) warm the surrounding air.
B) cool the surrounding air.
C) neither of these
Answer:
A satellite in an elliptical orbit travels at constant
A) velocity.
B) speed.
C) acceleration.
D) all the above
E) none of the above
Answer:
When blue food coloring is stirred into water, the result is a
A) homogeneous mixture called a solution.
B) homogeneous mixture called a suspension.
C) heterogeneous mixture called a solution.
D) heterogeneous mixture called a suspension.
E) pure liquid.
Answer:
Where groundwater discharges to a stream, the elevation of the water table next to the
stream
A) is lower than the surface of the stream.
B) is the same as the surface of the stream.
C) is higher than the surface of the stream.
D) Not enough information given
Answer:
Which interacts more with light of relatively high frequencies?
A) large particles
B) small particles
C) both the same
Answer:
Would you expect polypropylene to be denser or less dense than low-density
polyethylene? Why?
A) Polypropylene should be more dense because because it has a greater molecular
mass.
B) Polyproylene should be more dense because its molecules are able to pack more
closely together.
C) Polyproylene should be less dense because its molecules are not able to pack
together as tightly.
D) Polypropylene should be more dense given that the polyethylene is already known to
be of low density.
Answer:
As a block of ice at 0C melts, the block absorbs energy
A) and decreases in temperature.
B) and increases in temperature.
C) without a temperature change.
D) all of the above
E) none of the above
Answer:
The frequency with which a magnet plunges into and out of a wire coil equals the
frequency of the induced
A) voltage.
B) current.
C) both of these
D) none of the above
Answer:
Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed for a satellite
about Jupiter would be
A) less than 8 km/s.
B) greater than 8 km/s.
C) about 8 km/s.
Answer:
Why can’t we see atoms?
A) We see with light energy and the wavelength is larger than the object and so it is not
reflected.
B) Atoms are invisible.
C) We cannot see things that are microscopic.
D) We see with light energy but the atoms absorb all the light and therefore there are no
reflections.
E) Atoms do not interact with light energy and therefore we are unable to observe them
with light.
Answer:
Which of the following statements about strong or weak acids is true?
A) A weak acid and a strong acid at the same concentration are equally corrosive.
B) A weak acid readily forms ions when dissolved in water.
C) A strong acid will never react with a strong base.
D) A weak acid will react with a strong base.
Answer:
A block of ice sliding down an incline has half its maximum kinetic energy
A) at the top.
B) at the bottom.
C) half-way down.
D) need more information
Answer:
What is the molarity of 0.5 liters of a solution with five moles of sucrose in it?
A) 10 molar
B) 0.5 molar
C) 5 molar
D) 2.5 molar
E) 1 molar
Answer:
A main difference between gravitational and electric forces is that electric forces
A) attract.
B) repel or attract.
C) obey the inverse-square law.
D) act over shorter distances.
E) are weaker.
Answer:
The Dawn spacecraft entered into orbit around Ceres in
A) 2008.
B) 2012.
C) 2015.
D) 2016.
Answer:
Qualitatively, what happens to the hydroxide ion concentration if you decrease the
hydronium ion concentration?
A) The concentration of OH– stays the same but the ratio OH–/H3O+ changes.
B) The concentration of OH– increases but the ratio stays the same.
C) The concentration of OH– increases.
D) none of the above
Answer:
The higher the frequency of a wave, the
A) shorter the wavelength.
B) longer the wavelength.
C) neither of these
Answer: