A device that transforms mechanical energy to electrical energy is a
A) generator.
B) motor.
C) transformer.
D) magnet.
E) none of the above
Answer:
The break-up of Pangaea began in the Mesozoic era
A) during the Jurassic.
B) during the Triassic.
C) at the end of the Triassic.
D) at the end of the Ordovician.
Answer:
Cutting back on the pollutants that cause acid rain is one solution to the problem of
acidified lakes. Suggest another.
A) stop using NaCl to salt the roads in the winter
B) add a neutralizing substance such as limestone
C) add ammonium ions to the lakes
D) add chlorine and filter the water to remove any acidity in the lake
Answer:
Which of the following stick structures could describe pentane (C5H12)?
A) a
B) b
C) c
D) d
E) none of the above
Answer:
What is the main difference between a soap and a detergent?
A) Soaps are made from fatty acids, detergents are synthetic.
B) Soaps are biodegradable, detergents are not.
C) Detergents are better than soaps.
D) Soaps are all natural.
E) Soaps and detergents are exactly the same.
Answer:
If a light signal and a radio signal were emitted simultaneously from Alpha Centauri,
the first to reach Earth would be the
A) radio signal.
B) light signal.
C) both the same time
Answer:
According to cosmic inflation theory, the distribution of galaxies we see today is a
consequence of
A) the evolution of dark matter.
B) quantum fluctuations in the exceedingly small early universe.
C) random expansion.
D) some force yet to be identified.
Answer:
What is one of the advantages of a fuel cell?
A) They can run for a very long time as long as you keep adding fuel.
B) They are more efficient than combustion.
C) They have lower emission of pollutants than combustion.
D) all of the above
E) only A and B
Answer:
Your ears “pop” when you ascend to higher altitudes because
A) air pressure is greater at higher altitudes.
B) air temperature is lower at higher altitudes.
C) air pressure is lower at higher altitudes.
D) air is dryer at higher altitudes.
Answer:
What is the difference between a compound and a mixture?
A) A mixture can be physically separated into its components; a compound cannot be
physically separated into its components.
B) A compound can be physically separated into its components; a mixture cannot be
physically separated into its components.
C) A compound is just a mixture of elements.
D) The components of a mixture do not have the same properties individually as they
do when mixed.
E) The components of a compound have the same properties individually as they do
when mixed.
Answer:
What is a chemical reaction?
A) when one or more new compounds are formed by rearranging atoms
B) when a new element is formed by rearranging nucleons
C) when two solids mix together to form a heterogeneous mixture
D) when two liquids mix to form a homogeneous mixture
E) when a liquid undergoes a phase change and produces a solid
Answer:
The Doppler effect is a characteristic of
A) water waves.
B) sound waves.
C) light waves.
D) all of the above
E) none of the above
Answer:
Divergent boundaries are areas of
A) crustal formation.
B) crustal destruction.
C) continuous, high magnitude earthquakes.
D) intense compressional forces.
Answer:
As an object freely falls, its
A) velocity increases.
B) acceleration increases.
C) both of these
D) none of the above
Answer:
When a perched water table intersects the surface on a hillside, the result is
A) an artesian well.
B) a spring.
C) a lake.
D) a cone of depression.
Answer:
Red sunsets are due to light of lower frequencies that
A) is scattered from larger particles in the air.
B) is refracted from larger particles in the air.
C) is reflected by clouds and relatively large particles in the air.
D) survive being scattered in the air.
E) appear reddish orange to the eye.
Answer:
How many atoms of Oxygen (O) are in H3OClO4?
A) 5
B) 2
C) 3
D) 7
E) 1
Answer:
The force of gravity on a bowling ball rolling along a horizontal surface doesn’t change
its speed because the force is
A) small compared to the ball’s weight.
B) canceled by the normal force.
C) perpendicular to its direction of motion.
D) canceled by friction.
Answer:
A pulley has two supporting strands. To lift a load 1 meter means you will have to pull a
distance of
A) 1/2 m.
B) 1 m.
C) 2 m.
D) more than 2 m.
Answer:
Water precipitated over land completes its cycle as it
A) enters streams and lakes and makes its way to the oceans.
B) percolates into the ground.
C) evaporates from the surface to the atmosphere.
D) enters streams and lakes, seeps into the ground, flows to the ocean, or evaporates.
Answer:
A substance consisting of which molecule shown below should have a higher boiling
point?
A) The molecule on the left, CO , because it has a fewer number of atoms.
B) The molecule on the right, Cl, because it has a greater number of atoms.
C) The molecule on the left, CO , because it is less symmetrical.
D) The molecule on the right, Cl, because of electronegativity considerations.
Answer:
Between which planets is the asteroid belt found?
A) between Mars and Jupiter
B) between Earth and Mars
C) between Earth and Venus
D) between Jupiter and Neptune
Answer:
Compared to the buoyant force on you when floating in fresh water, buoyant force on
you when floating in the dense water of the Dead Sea is
A) less because volume displacement is less.
B) more because of the greater density of fluid displaced.
C) the same.
Answer:
Which of the following statements best describes the concept of entropy?
A) Energy has a tendency to disperse.
B) Energy is neither created nor destroyed.
C) The entropy of the universe is constantly decreasing.
D) The energy released in a chemical reaction is the same as the difference in the
energy of the bonds broken and formed.
E) Energy has a tendency to remain in one place.
Answer:
With daytime temperatures that can reach 430C, why is nighttime on Mercury so cold?
A) Because the year is so short, there isn’t enough time for the heat to build up in the
equatorial regions.
B) With very little atmosphere, heat is quickly lost back into space.
C) The weak gravitational field doesn’t retain the daytime’s heat.
D) The solar winds quickly dissipate all heat on the planet’s dark side.
Answer:
The flow of groundwater is dependent on
A) topography of the ground surface.
B) gravity only.
C) pressure only.
D) hydraulic conductivity and pressure.
Answer:
Who established the principle of faunal succession?
A) Alfred Wegener.
B) Harry Hess.
C) William “Strata” Smith.
D) Andrija Mohorovicic.
Answer:
A melon is projected into the air with 100 J of kinetic energy in the presence of air
resistance. When it returns to its initial level its kinetic energy is
A) less than 100 J.
B) more than 100 J.
C) 100 J.
D) need more information
Answer:
A heavy ball hangs by a string, with a second string attached to its bottom (Figure 1.7 in
your text). A quick pull on the bottom string breaks the
A) top string.
B) bottom string.
C) top or bottom string equally likely.
D) none of the above
Answer:
Jake pulls on a 25-kg cart with a constant force of 50 N. What is the wagon’s
acceleration?
A) 0.2 m/s2
B) 2.0 m/s2
C) 5 m/s2
D) 20 m/s2
E) 200 m/s2
Answer:
According to the following reaction, which molecule is acting as an acid?
H3O+ + HSO4
– → H2O + H2SO4
A) H2SO4
B) H2O
C) H3O+
D) HSO4
–
E) none of the above
Answer:
A golf ball illuminate by only red light casts a colorless shadow. If instead it is also
illuminated by a close-by green light source, the non-overlapping shadows will be
A) green and red.
B) cyan and magenta.
C) white.
D) none of the above
Answer:
When the distance between a pair of stars doubles, the force between them
A) decreases by one-quarter.
B) decreases by one-half.
C) increases to twice as much.
D) increases to four times as much.
E) stays the same.
Answer:
Which of the following statements best describes a relatively polar bond?
A) a very electronegative atom and a weakly electronegative atom are covalently bound
B) two very electronegative atoms are covalently bound
C) two very electronegative atoms undergo ionic bonding
D) two weakly electronegative atoms undergo ionic bonding
E) none of the above
Answer:
If a material has a half-life of 24 hours, how long do you have to wait until the amount
of radioisotope is 1/4 its original amount?
A) 12 hours
B) 24 hours
C) 48 hours
D) 72 hours
E) practically forever, but it may be safe by then
Answer: