The brightest color emitted by the Sun is
A) red.
B) yellow-green.
C) blue.
D) all the same
Answer:
Water at 4C will contract when it is slightly
A) cooled.
B) warmed.
C) both of these
D) none of the above
Answer:
Earth’s internal layers were discovered by studying the propagation of P- and S- waves
through Earth’s interior. In comparison to P-waves, the movement of S-waves are
A) faster and compresses and expands the rock as they move through it.
B) faster and vibrates rock particles up and down and side-to-side.
C) slower and can travel through solid granite, magma, water or air.
D) slower and they can only travel through solids, not liquids.
Answer:
A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s2. What is the
mass of the car?
A) 500 kg
B) 1000 kg
C) 1500 kg
D) 3000 kg
E) none of these
Answer:
The specific heat capacity of aluminum is more than twice that of copper. Place equal
masses of aluminum and copper wire in a flame and the wire to heat up quickest will be
A) copper.
B) aluminum.
C) both the same
Answer:
The shell model is an example of a
A) physical model.
B) conceptual model.
C) both a physical and conceptual model.
D) None of the above.
Answer:
The principle of original horizontality states that each
A) sedimentary layer is older than the layer above.
B) sedimentary layer is younger than the layer above.
C) new layer of sediment is laid down nearly horizontally over older sediment.
D) new layer of sediment is laid down accordingly.
Answer:
In which of these locations is cosmic ray intensity greatest?
A) Mexico City
B) Toronto
C) Singapore
D) all about the same
Answer:
Why are ion-dipole attractions stronger than dipole-dipole attractions?
A) The chemical bond in an ion-dipole molecule is similar also a covalent bond.
B) The magnitude of the electric charge associated with an ion is much greater.
C) Dipole areas are subject to changing from positive to negative regions on the
molecule.
D) Like charge (dipole) does not attract like charge (another dipole).
Answer:
What is the primary difference between a fuel cell and a battery?
A) Fuel cells do not run down because they can be refueled; batteries run down and
need to be recharged.
B) Batteries can be recharged, fuel cells cannot.
C) Batteries supply electricity; fuel cells supply heat.
D) Fuel cells oxidize to supply electricity, batteries reduce to supply electricity.
E) Fuel cells do not use metals as oxidants and reductants, batteries have a static
reservoir of oxidant and reductant.
Answer:
After an apple pie is taken from an oven, the pie filling is hotter than the crust due to
A) water in the filling that better retains thermal energy.
B) uneven temperatures.
C) high conductivity of apples.
Answer:
What is the number of molecules of O2 consumed if you combust one mole of CH4
according to the following balanced equation?
CH4 + 2 O2 → CO2 + 2 H2O
A) 1 molecule
B) 2 molecules
C) 6.022 1023 molecules
D) 1.204 024 molecules
E) 1 g of molecules
Answer:
Why is carbon better than lead as a moderator in nuclear reactors?
A) Carbon produces the high energy, high speed neutrons necessary for maintaining the
nuclear chain reaction.
B) Carbon slows down the neutrons making them more effective in stimulating the
nuclear chain reaction.
C) Lead absorbs the neutrons rather than allowing them to rebound to maintain the
nuclear chain reaction.
D) Lead slows down the neutrons making them less effective in stimulating the nuclear
chain reaction.
Answer:
All watergroundwater, surface water, and frozen waterflows downslope in response to
A) pressure.
B) hydraulic gradient.
C) permeability.
D) gravity.
Answer:
Which of the following does not describe a nuclear fission reaction?
A) The number of nucleons in the products is different from the number of nucleons in
the starting material.
B) The mass of the products is less than the mass of the reactants.
C) The energy released is proportional to the mass difference in the system.
D) All of the above describe a fusion reaction.
E) None of the above describe a fusion reaction.
Answer:
A stone is thrown horizontally from the top of a cliff. One second after leaving your
hand it drops a vertical distance of
A) 5 m.
B) 10 m.
C) 15 m.
Answer:
The fundamental source of energy released by a tropical hurricane comes from
A) the trade winds.
B) the Sun.
C) warm moist air.
D) the convergence of maritime polar and maritime tropical air masses.
Answer:
While driving down the highway a lovebug spatters onto your windshield. Which
experiences the greater force of impact?
A) the lovebug
B) your car
C) both the same but with different consequences
Answer:
The oldest known fossils of single-celled organisms are
A) 4.6 billion years old.
B) 3.9 billion years old.
C) 3.3-3.5 billion years old.
D) 1.3-1.5 billion years old.
Answer:
What is the speed of a 6-kg ball with a momentum of 72 kg∙m/s?
A) 3 m/s
B) 4 m/s
C) 12 m/s
D) 48 m/s
E) none of the above
Answer:
The fundamental time unit representing a major change in life forms is the
A) eon subdivision.
B) era subdivision.
C) period subdivision.
D) epoch subdivision.
Answer:
Pioneer 10 was able to escape the solar system by
A) having a sufficient escape velocity at launch.
B) “bouncing off” Jupiter like a tennis ball bouncing off an approaching tennis racket.
C) refueling via solar cells.
D) nuclear-powered sustained thrust.
Answer:
How do you make a proton out of a hydrogen atom?
A) remove an electron from a hydrogen atom
B) remove a proton from a helium nucleus
C) let the hydrogen atoms undergo fusion
D) let the hydrogen atoms combine to form a hydrogen molecule and eject an electron
E) let the hydrogen atoms combine to form a hydrogen molecule and eject a proton
Answer:
Any object that is warmer than its surroundings will
A) absorb heat.
B) emit radiation.
C) reflect heat.
D) become denser.
Answer:
When a bar magnet is broken in half, the strength of the four new poles relative to pole
strength before breaking is
A) less than half.
B) half.
C) the same.
D) somewhat more.
Answer:
Joshua stands on a floor that supports him. When Sydney rides piggy-back on Joshua,
the support force by the floor beneath Joshua
A) decreases.
B) remains constant.
C) increases.
Answer:
Why might an area with a large amount of limestone (CaCO3) be less susceptible to
acid rain?
A) The acid in the rain is neutralized by the natural base in the limestone.
B) The rain travels quickly through the porous limestone and therefore the rate of
reaction is slower.
C) Limestone is degraded by acid rain and therefore acid rain has the same damaging
effects.
D) Only acid rain made from sulfur compounds reacts with the limestone.
E) none of the above
Answer:
What property of carbon allows for the formation of so many different organic
molecules?
A) Carbon forms three different isotopes which allows for the formation of many more
molecules than other elements.
B) Carbon atoms are unique in their ability to form strong chemical bonds repeatedly
with other carbon atoms, which permits the formation of countless possible structures.
C) Carbon atoms uniquely contain exactly the same number (six) of protons, neutrons
and electrons in their atomic structure.
D) Carbon resides in the exact middle of the periodic table, from left to right, with
exactly the same number of reactive elements on either side of it. It can therefore react
with the maximum number of elements.
Answer:
For electric power that costs 10 cents per kilowatt hour, the cost of operating a 110-V
heater that uses 20 A for 10 hours is
A) $0.22.
B) $0.55.
C) $2.20.
D) $5.50.
E) none of the above
Answer:
Organisms with the ability to be easily preserved as fossils began to flourish about
A) 4.6 billion years ago.
B) 3.8 billion years ago.
C) 543 million years ago.
D) 65 million years ago.
Answer:
When a bar magnet is thrust into a coil of wire, the coil
A) attracts the magnet as it enters.
B) repels the magnet as it enters.
C) both of these
D) none of the above
Answer:
Microtechnology began
A) about 60 years ago with the invention of solid state transistors.
B) in the 1990s with the use of computers.
C) with the development of micron chemistry in the early 1800s.
D) at the close of World War II.
Answer: