A galvanometer calibrated to read current is
A) an ammeter.
B) a voltmeter.
C) an ohm meter.
D) none of the above
Answer:
A mirage is a result of atmospheric
A) reflection.
B) refraction.
C) scattering.
D) dispersion.
E) aberrations.
Answer:
Water, O, and methane, C , have about the same mass and differ by only one type
of atom. Why is the boiling point of water so much higher than that of methane?
A) The water molecule is less symmetrical than is the methane molecule.
B) The oxygen of a water molecule has two lone pairs of electrons.
C) The electronegativity difference between oxygen and hydrogen is greater than the
electronegativity difference between carbon and hydrogen.
D) all of the above
Answer:
Water and ethanol can be separated by heating the ethanol until it boils away from the
water. What type of change is this?
A) a physical change
B) a chemical change
C) a molecular change
D) a decomposition
E) none of the above
Answer:
If you have one molecule of TiO2, how many molecules of O2 does it contain?
A) None, O2 is a different molecule than TiO2.
B) One, TiO2 is a mixture of Ti and O2.
C) Two, TiO2 is a mixture of Ti and 2 O.
D) Three, TiO2 contains three molecules.
E) none of the above
Answer:
Maximum magnetic force occurs when electrons move
A) in the same direction as the magnetic field.
B) opposite to the magnetic field direction.
C) perpendicular to the magnetic field direction.
D) at non-right angles to the magnetic field direction.
E) none of the above
Answer:
Severe thunderstorms are common
A) over the central United States.
B) in Arizona.
C) in the northwestern United States.
D) along the Pacific coast.
Answer:
An object in motion tends to remain in motion
A) because of a force within the object.
B) only when an external force acts on it.
C) without the need of a force.
D) due to its nature.
Answer:
Which of the following statements is untrue about oxidation and reduction processes?
A) An oxidation can happen without a reduction.
B) It involves the exchange of electrons.
C) Often ions are generated or consumed.
D) Electrons are often involved in oxidation and reduction reactions.
E) All of the above are true.
Answer:
A galvanometer measures
A) magnetic fields.
B) electric current.
C) electric voltage.
D) none of the above
Answer:
Consider a huge rotating cloud of particles in space that gravitate together to form an
increasingly dense ball. As the cloud shrinks in size, it
A) rotates slower.
B) rotates faster.
C) rotates at the same rate.
Answer:
Two identical freight cars roll without friction towards each other on a level track. One
car rolls at 2 m/s and the other car rolls at 1 m/s. After the cars collide, they couple and
roll together with a speed of
A) 0.5 m/s.
B) 0.33 m/s.
C) 0.67 m/s.
D) 1.0 m/s.
E) none of the above
Answer:
Going from continental land toward the deep ocean basin, the continental margin
consists of the
A) slope, the shelf, and the rise.
B) rise, the slope, and the shelf.
C) shelf, the slope, and the rise.
D) shelf, abyssal plain, and the mid-ocean ridge.
Answer:
What is a half-life?
A) It is the time it takes for 1/2 of the material to undergo radiodecay.
B) It is the time needed until 1/2 of the radiation is gone.
C) It is the time it takes for 1/2 of the material to decompose.
D) It is half of the lifetime of the radioactivity in a sample.
E) all of the above
Answer:
According to dark matter theory, most of the mass of a spiral galaxy is found
A) within the central supermassive black hole.
B) within the luminescent spiral arms.
C) outside of the luminescent spiral arms.
D) in the form of dark energy.
Answer:
The net force on an object is
A) most often its weight.
B) the combination of all forces acting on it.
C) the force of friction acting on it.
Answer:
Which of the above sections of this molecule would be considered an unsaturated
portion of the molecule?
A) a
B) b
C) c
D) a and b
E) all of the above
Answer:
The energy released by a hurricane comes from
A) cold Atlantic waters.
B) spiraling winds.
C) warm, moist air above warm, tropical oceans.
D) the Sun.
Answer:
When rock is broken down into smaller and smaller pieces, we say the rock has
undergone
A) chemical weathering.
B) mechanical weathering.
C) erosion.
D) lithification.
Answer:
Food is cooked faster in a pressure cooker due to its
A) greater rate of bubble formation in the water.
B) higher thermal energy.
C) higher temperature.
D) none of the above
Answer:
In a circuit powered by a battery it is correct to say that electrons flow
A) from the battery and into the circuit.
B) from the negative terminal to the positive terminal of the battery.
C) through both the battery and the devices making up the circuit.
D) none of the above
Answer:
Refraction occurs when light passing from one medium to another
A) changes frequency.
B) changes speed.
C) loses energy.
D) reflects inward.
Answer:
A softball player determines her pitching speed by throwing a ball horizontally from an
elevation of 20 m above the ground. The ball lands 50 m downrange. What is her
pitching speed?
A) 5 m/s
B) 10 m/s
C) 20 m/s
D) 25 m/s
E) none of the above
Answer:
The image below shows a beam of radiation passing between two electrically charged
plates.
Which of the beams is due to a high energy electron?
A) a
B) b
C) c
D) all of the above
E) none of the above
Answer:
If you played music under water the wavelength of middle C would be
A) lengthened.
B) shortened.
C) unaffected.
D) none of the above
Answer:
If you drop an object, it will accelerate downward at a rate of 10 m/s2. If you instead
throw it downward, its acceleration (in the absence of air resistance will be
A) less than 10 m/s2.
B) 10 m/s2.
C) greater than 10 m/s2.
Answer:
When a gas is changed to a liquid phase, the gas
A) releases energy.
B) absorbs energy.
C) neither of these
Answer:
Which of the following is a metalloid?
A) antimony (atomic no. = 51)
B) zinc (atomic no. = 30)
C) iodine (atomic no. = 53)
D) uranium (atomic no. = 92)
E) sulfur (atomic no. = 16)
Answer:
Evacuated Magdeburg hemispheres are each
A) sucked together.
B) pushed together by the atmosphere.
C) held together by tension.
Answer:
Which isotopes are most appropriate for dating formations from the following ages: (a)
the early Precambrian; (b) the Mesozoic; (c) the late Pleistocene?
Answer:
Which of the following is the correct electron dot structure for chlorine (atomic no. =
17)?
A) a
B) b
C) c
D) d
E) e
Answer:
Why might a solvent like turpentine be better for removing grease and grime than
water?
A) Like dissolves like.
B) Oil and grease have similar interatomic forces as the turpentine and so are more
soluble.
C) Water is too polar and doesn’t interact well with the nonpolar oils.
D) Oil and grease have very limited solubility in the water.
E) all of the above
Answer:
A positive ion has a deficiency of
A) electrons.
B) neutrons.
C) negative ions.
Answer: