Compared with a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much
A) inertia.
B) mass.
C) volume.
D) all of the above
E) none of the above
Answer:
Why is there a drastic reduction in ozone in the spring?
A) There is a sudden increase in Cl atoms in the spring.
B) It is warmer in the spring.
C) There are more chlorofluorocarbons in the spring.
D) all of the above
E) only a and b
Answer:
Because most reflecting surfaces are horizontal, the polarization axes of ordinary
sunglasses are
A) vertical.
B) horizontal.
C) at right angles to each other.
Answer:
What is the main difference between High Density PolyEtyhlene (HDPE) and Low
Density PolyEthylene(LDPE)?
A) HDPE has very long chains packed close together; LDPE has long chains that are
branched and do not pack together well.
B) One is made from high density ethylene, the other from low density ethylene.
C) HDPE has very long chains packed close together; LDPE has short chains that do
not pack together well.
D) HDPE is more useful than LDPE.
E) LDPE is more useful than HDPE.
Answer:
Minerals are formed from the combination of different elements. The combination of
different metallic elements produces
A) metallic minerals.
B) metallic and nonmetallic minerals.
C) nonmetallic minerals.
D) polymorphs.
Answer:
The Earth’s oceans evolved
A) from condensation of water vapor in a hydrogen-oxygen rich atmosphere.
B) from condensation of water vapor from volcanic eruptions.
C) with accumulation of rainfall.
D) as Earth warmed.
Answer:
A common pulley acts similar to a
A) hydraulic press.
B) gear.
C) common lever.
D) tension producer.
Answer:
The fact that one side of the Moon always faces Earth is evidence that while revolving
about the Earth it
A) does not rotate about its axis.
B) rotates about its axis.
Answer:
“Cosmological Redshift” refers to
A) the expansion of space itself.
B) the expansion of galaxies.
C) the expansion of red giants.
D) the tendency of light to expand when free of gravitational influences.
Answer:
Two lamps, a thick-filament one and a thin-filament one, are connected in series to a
battery. The current is greater in the lamp with the
A) thick filament.
B) thin filament.
C) same in each
Answer:
When the isotope bismuth-213 emits an alpha particle, what new element results?
A) lead
B) platinum
C) polonium
D) thallium
Answer:
What is the valence shell?
A) It is the outermost shell of electrons in an atom.
B) It is the shell of electrons in an atom that is the least reactive.
C) It is the last partially filled orbital in an atom.
D) It is the shell of electrons in element V (atomic no. = 23).
E) It is the same as the orbital configuration.
Answer:
Oxygen atoms are used to make water molecules. Does this mean that oxygen, , and
water, O, have similar properties?
A) Yes, and this explains how fish are able to breathe water.
B) Yes, but that their properties are similar is only a coincidence.
C) No, but their similar properties are only a coincidence.
D) No, compounds are uniquely different from the elements from which they’re made.
Answer:
The chlorinated fluorocarbons molecules are acting as a(n) ________ by converting
hundreds of thousands of molecules before they are inactivated.
A) catalyst
B) aerosol
C) active site
D) acid
E) base
Answer:
Which of the above images best depicts a water solution of a weak acid (represented by
HA)?
A) A
B) B
C) C
D) All of the above are weak acids.
E) None of the above are weak acids.
Answer:
Why is the combination of two protons and two neutrons stable, but two protons and
one neutron is not?
A) There are not enough neutrons to overcome the electrical repulsion of the protons.
B) There are not enough neutrons to overcome the nuclear repulsion of the protons.
C) The nuclear attraction between protons is greater than that between neutrons.
D) The electrical repulsion between the two protons is greater in one case than the
other.
E) none of the above
Answer:
When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard,
he doesn’t slip off the skateboard because of
A) inertia in motion.
B) momentum change.
C) friction between his feet and the board.
Answer:
Which type of radiation is being emitted in the following incomplete nuclear equation?
Pb → Bi + ??
A) alpha
B) beta
C) gamma
D) A and B
E) none of the above
Answer:
The secondary rainbow is dimmer than the primary rainbow because
A) its colors are inverted.
B) it is larger, and its energy spreads across more area.
C) it is farther from the viewer.
D) it simply has much less energy than the primary bow.
E) of a double reflection and refraction in the drops.
Answer:
Why is heat often added to chemical reactions performed in the laboratory?
A) to allow a greater number of reactants to pass over the activation energy
B) to increase the rate at which reactant collide
C) to compensate for the natural tendency of energy to disperse
D) all of the above
Answer:
The motion of atoms and molecules that most affects temperature is
A) translational.
B) rotational.
C) vibrational.
D) none of the above
Answer:
The ultimate source of all magnetism is
A) tiny bits of iron.
B) tiny domains of aligned atoms.
C) ferromagnetic materials.
D) moving electric charge.
Answer:
The main difference between sand dunes and ripple marks is
A) ripple marks are only caused by water.
B) ripple marks are larger than sand dunes.
C) sand dunes are larger than ripple marks.
D) ripple marks are stationary.
Answer:
If the half-life of some radioactive element is 1 billion years, and a mass of rock
originally contained 100 g of that element, how many grams of the radioactive element
would be left after three billion years had passed?
A) 6.25 g
B) 12.5 g
C) 25 g
D) 50 g
E) none
Answer:
Red blood cells have a high concentration of dissolved ions. When placed into pure
water they rupture. Why?
A) Osmosis draws water into the cell until it pops.
B) Water dissolves the cell membrane.
C) Osmosis draws water out of the cell until it tears.
D) The cells are not stable outside of a biological host.
E) none of the above
Answer:
Which of the following molecules could be a structural isomer for the underlined
molecule below?
A) a
B) b
C) c
D) all of the above
E) none of the above
Answer:
A supercluster is a
A) cluster of galactic clusters.
B) very large local cluster.
C) local cluster with at least 10,000 supergiant stars.
D) local cluster with at least 500 supermassive black holes.
Answer:
When sound travels faster at ground level than higher in the air, sound tends to bend
A) upward.
B) downward.
C) neither of these
Answer:
When you stand at rest on a pair of bathroom scales, the readings on the scales will
always
A) each be half your weight.
B) each equal your weight.
C) add to equal your weight.
D) add up to more than your weight.
Answer:
When Jean hikes a distance of 1 km in a time of one-half hour her average speed is
A) nearly 1 km/h.
B) 1 km/h.
C) slightly more than 1 km/h.
D) 2 km/h.
Answer:
When a volume of air is compressed, its temperature
A) increases.
B) decreases.
C) neither increases nor decreases.
Answer:
The characteristic that distinguishes schist from slate is that schist is
A) foliated and slate is not.
B) fine-grained and slate is coarse-grained.
C) coarse-grained and slate is fine-grained.
D) not foliated and slate is foliated.
Answer:
Which of the above illustrations shows a neutral aqueous solution?
A) A
B) B
C) C
D) All of the above are neutral solutions.
E) none of the above
Answer:
How many diatomic molecules are represented in the illustration above?
A) 1
B) 2
C) 3
D) 4
Answer: