Astronomers who subscribe to the Big Bang theory believe the Big Bang occurred
A) about 14 billion years ago.
B) at the beginning of time.
C) both of these
D) neither of these
Answer:
The first minerals to crystallize are those with the
A) higher melting point.
B) lower melting point.
Answer:
How many electrons are transferred from iron atoms to oxygen atoms in the formation
of two molecules of iron hydroxide, Fe ?
A) 4 electrons
B) 8 electrons
C) 16 electrons
D) 12 electrons
Answer:
The flow of charge in a circuit depends on
A) adequate resistance.
B) a potential difference.
C) adequate chemical action.
D) all of the above
Answer:
Which of the following might have the best solubility in water?
A) CH3OH
B) Cl2
C) O2
D) CH3CH3
E) none of the above
Answer:
When a cannon fires a cannonball at a given speed, the smaller recoil speed of the
cannon is due to differences in
A) forces.
B) times.
C) masses.
D) momenta.
Answer:
Nebula that tend to be bluish in color are the
A) emission nebula.
B) reflection nebula.
C) dark nebula.
D) cyan nebula.
Answer:
Which of the following elements has two valence electrons?
A) Na
B) Mg
C) H
D) Ne
E) Li
Answer:
An electrically polarized object normally has
A) a net charge of zero.
B) displaced charges.
C) both of these
D) none of the above
Answer:
When you look at yourself in a pocket mirror, and then hold the mirror farther away,
you see
A) more of yourself.
B) less of yourself.
C) the same amount of yourself.
Answer:
Color is not a reliable means for mineral identification because
A) minerals come in a variety of colors, and chemical impurities in the mineral can
affect color.
B) minerals can weather and change color.
C) a mineral’s powdered color is different than its solid color.
D) there are so many colored minerals.
Answer:
An ideal transformer has 50 turns in the primary and 500 turns in the secondary. An
input of 12 V will produce an output of
A) 12 V.
B) 120 V.
C) 1200 V.
D) none of the above
Answer:
When a boxer is moving away from a punch, the force experienced is reduced because
A) momentum transfer is reduced.
B) the time of contact is increased.
C) the force is less effective.
D) all of the above
Answer:
Why doesn’t the Moon fall toward Earth like apples do?
A) the great distance of the Moon prevents falling
B) moon’s small mass prevents falling
C) moon does fall but its great distance keeps it from getting closer
D) moon does fall but due to its tangential motion it also falls around Earth
Answer:
The net electric charge on a current-carrying wire is normally
A) zero.
B) equal and opposite to the charge within the wire.
C) the voltage divided by the resistance.
Answer:
The rock that has undergone the greatest extent of metamorphic change is
A) gneiss.
B) slate.
C) shale.
D) schist.
Answer:
In practice, a good insulator
A) stops heat flow.
B) slows heat flow.
C) speeds negative heat flow.
D) all of the above
Answer:
As more lamps are put into a series circuit, the overall current in the power source
A) increases.
B) decreases.
C) stays the same.
Answer:
A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves
at constant velocity. When the glue gives way, the stone falls and hits the floor
A) ahead of the midpoint of the ceiling.
B) exactly below the midpoint of the ceiling.
C) behind the midpoint of the ceiling.
D) none of the above
Answer:
Relate silica content to crystallization from a magma.
Answer:
A small rock in interplanetary space is called a
A) meteor.
B) meteoroid.
C) meteorite.
Answer:
What holds Earth satellites up so they don’t crash into Earth?
A) gravity
B) centripetal force
C) centrifugal force
D) the absence of air resistance
E) nothing, they continually fall fast enough around Earth not to crash
Answer:
Unstable conditions and stormy weather can be expected with the passage of a
A) low pressure system.
B) high pressure system.
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:
Warm air has a higher capacity for water vapor, because in warm air
A) fast-moving water-vapor molecules are too energetic to stick together.
B) molecules expand.
C) water-vapor molecules condense.
D) there are more water vapor molecules than in cool air.
Answer:
Large deposits of gypsum and other evaporite minerals are evidence of
A) volcanic activity during the Cambrian period.
B) dried up shallow seas from the Silurian period.
C) seafloor spreading during the Permian period.
D) glaciation during the Triassic period.
Answer:
R = reactants P = products
Given that the above energy profiles have the same scale, which of the reactions would
require the most energy?
A) a
B) b
C) c
D) d
E) none of the above
Answer:
Another term for a spreading center is
A) convergent boundary.
B) divergent boundary.
C) transform fault boundary.
D) none of the above.
Answer:
A 1000-kg car accelerates at 2 m/s2. What is the net force exerted on the car?
A) 500 N
B) 1000 N
C) 1500 N
D) 2000 N
E) none of these
Answer:
The total momentum of a flock of identical birds could be zero only if the birds are
A) taking off from the ground.
B) flying in the same direction.
C) flying in different directions.
D) very tired and coming down to rest.
Answer:
The general chemical equation for photosynthesis is shown below. Through this
reaction are the oxygens of the water molecules, H2O, oxidized or reduced?
6 + 6 O → + 6
A) The oxygens of the water molecules are oxidized.
B) The oxygens of the water molecules are reduced.
C) The oxygens of some of these water molecules are oxidized while others are
reduced.
D) The oxygens of the water molecules are neither oxidized nor reduced.
Answer:
Which of these is not a metal?
A) selenium (atomic no. = 34)
B) gallium (atomic no. = 31)
C) lithium (atomic no. = 3)
D) potassium (atomic no. = 19)
E) vanadium (atomic no. = 23)
Answer: