The most powerful agent of erosion is
A) stream flow.
B) glacial action.
C) action from waves and ocean currents.
D) wind.
Answer:
Does a radioactive isotope ever lose its radioactivity?
A) yes
B) no
C) sometimes
D) usually
Answer:
What happens to the properties of elements across any period of the periodic table?
A) The elements tend to become more metallic in nature since they are increasing in
atomic number.
B) The elements get much larger in size because of the addition of more protons and
electrons.
C) The properties of the elements gradually change across any period of the periodic
table.
D) All of the above are true.
Answer:
After taking a shower and stepping outside the shower stall, the chill you often feel is
mainly due to
A) evaporation.
B) condensation.
C) sublimation.
D) none of the above
Answer:
The inner core is solid because
A) it is composed of iron and nickel.
B) the surrounding outer layers act as a blanket to insulate the core.
C) pressure from the weight of the surrounding layers prevents the inner core from
melting.
D) none of these, for the inner core is not solid, but is liquid
Answer:
A hypothesis that is scientific must have a test for proving it
A) right.
B) wrong.
C) either.
Answer:
If you had a 1 M solution of a strong acid what would be its pH?
A) 0
B) 1
C) 7
D) 8
E) 13
Answer:
If the following generic atom were to undergo ionization, what would the most likely
product be?
A) +1
B) -2
C) -3
D) +4
E) would probably not ionize
Answer:
The product of gas pressure and volume for a given mass of gas is constant
A) if the temperature doesn’t change.
B) whether or not the temperature changes.
C) never.
D) none of the above
Answer:
In radioactive decay, when the parent material decays to one-half of its original amount,
the time is
A) one half-life.
B) two half-lives.
C) three half-lives.
D) four half-lives.
Answer:
A falling object that has reached its terminal speed continues to gain
A) acceleration.
B) speed.
C) both of these
D) none of the above
Answer:
A blue shift for light indicates that the light source is moving
A) toward you.
B) away from you.
C) both of these
D) neither of these
Answer:
An archer shoots an arrow. If the action force is the bowstring on the arrow, the reaction
is the
A) weight of the arrow.
B) air resistance on the bow.
C) friction of the ground on the archer’s feet.
D) grip of the archer’s hand on the bow.
E) arrow’s push on the bowstring.
Answer:
The following picture shows an organic molecule:
Which region (a-b-c) is a phenolic functional group?
A) a
B) b
C) c
D) b or c
E) b and c
Answer:
How high can water be theoretically lifted by a vacuum pump at sea level?
A) less than 10.3 m
B) 10.3 m
C) more than 10.3 m
Answer:
Take money away from your bank account and the bank will show a negative credit.
Take an electron away from an atom, however, and the atom shows up positive.
Explain.
A) Electrons are already negative. Therefore, we know from basic math that subtracting
a negative (number) from a neutral (atom), will make the result positive.
B) Neutral atoms contain identically charged but oppositely signed protons and
electrons. Removing one of the negative electrons results in an excess of positively
charged protons.
C) Removing an electron from an atom does not have the atom show up positive. It
simply leaves the atom short one electron.
D) Atoms are constantly exchanging electrons. Having an atom “show up positive” is
only an expression indicating that it has taken its turn in the game of electron exchange.
Answer:
In order for clouds to form, air must be lifted. The three principal lifting mechanisms
are
A) orographic, condensational, and frontal lifting.
B) orthographic, conversational, and frontal lobotomy.
C) convectional, orographic, and frontal lifting.
D) adiabatic, topographic, and inversional lifting.
Answer:
The oldest known fossils are
A) trilobites and brachiopods.
B) algae and bacteria.
C) fungi and algae.
D) worms and jellyfish.
Answer:
Of the sciences known as physics, chemistry, and biology, the most basic is
A) physics.
B) chemistry.
C) biology.
D) none in particular, as each may be considered fundamental.
Answer:
How much energy, in kilojoules, is released or absorbed from the reaction of one mole
of nitrogen, , with three moles of molecular hydrogen, , to form two moles of
ammonia, N ?
H-N (bond energy: 389 kJ/mol)
H-H (bond energy: 436 kJ/mol)
N N (bond energy: 946 kJ/mol)
N N + H-H + H-H → N + N
A) +899 kJ/mol absorbed
B) -993 kJ/mol released
C) +80 kJ/mol absorbed
D) -80 kj/mol released
Answer:
As air flows up the side of a mountain, the air pressure
A) increases.
B) decreases.
C) gets warmer.
D) gets colder.
Answer:
Plastic wrap is made of nonpolar molecules and is able to stick well to polar surfaces,
such as glass, by way of dipole/induced dipole molecular attractions. How is it that
plastic wrap also sticks to itself so well?
A) by way of dipole-dipole molecular attractions
B) by way of dipole-induced dipole molecular attractions
C) Ions are formed as the plastic rubs against itself.
D) by way of induced dipole-induced dipole molecular attractions
Answer:
Normally a balloon charged to several thousand volts has a relatively small amount of
A) charge.
B) energy.
C) both of these
D) none of the above
Answer:
The scientific method is most effective in
A) making hypotheses.
B) gaining, organizing, and applying new knowledge.
C) discovering new things.
D) making theories.
E) performing experiments.
Answer:
The equilibrium rule states that the vector sum of all forces acting on a
A) body at rest is zero.
B) body in uniform motion is zero.
C) non-accelerating body is zero.
D) all of the above
Answer:
Alternating current is normally produced by a
A) battery.
B) generator.
C) both of these
D) neither of these
Answer:
Which of the above might best describe how soap behaves in a nonpolar solvent like
turpentine?
A) a
B) b
C) c
D) d
E) none of the above
Answer:
Two charged particles repel each other with a force F. If the charge of one particle is
doubled and the distance between them is doubled, the force will be
A) F.
B) 2 F.
C) F/2.
D) F/4.
E) none of the above
Answer:
What are metalloids?
A) elements that have some properties like metals and some like nonmetals
B) elements that are smaller than metals
C) elements found in asteroids
D) elements that are larger than nonmetals
E) elements that have properties different than either the metals or the nonmetals
Answer:
A hockey puck slides across a frozen pond. If ice friction and air resistance are
neglected, the force needed to keep the puck sliding at constant velocity is
A) 0 N.
B) equal to the weight of the puck.
C) the weight of the puck divided by the mass of the puck.
D) the mass of the puck multiplied by 10 m/s2.
E) none of the above
Answer:
The flow of air in the upper atmosphere is predominantly from
A) east to west.
B) west to east.
C) north to south.
D) south to north.
Answer: