Metals are often used for making designer jewelry because they
A) do not conduct heat well.
B) conduct electricity.
C) are shiny.
D) are strong but can be bent.
E) c and d
Answer:
A pair of 1-ohm resistors connected in series has a combined resistance of
A) 1 ohm.
B) 2 ohms.
C) 1/2 ohm.
D) none of the above
Answer:
A main sequence star begins transforming into a red giant when
A) helium begins fusing.
B) helium within the core begins to expand.
C) contracting helium causes hydrogen to fuse.
D) hydrogen starts fusing within the core.
Answer:
The following set of redox reactions takes place when iron is dipped in a solution of
copper ions.
Fe → Fe+2 + 2e-
Cu+2 + 2e- → Cu
Which of the following describes what is happening on the surface of the iron?
A) The copper starts to plate out on iron.
B) The iron rusts in the water.
C) The iron starts to plate out on the copper.
D) The iron corrodes the copper.
E) none of the above
Answer:
In a thick bed of sedimentary rocks we find an igneous dike. The order of formation is
A) together.
B) igneous before sedimentary.
C) sedimentary before igneous.
D) unknown.
Answer:
As a bowling ball that rolls off the edge of a table falls, its vertical component of
motion
A) decreases.
B) remains constant.
C) increases.
Answer:
Convection currents in the air near a seashore are produced by
A) shifting winds.
B) unequal heating of land and water.
C) varying temperatures.
D) none of the above
Answer:
Whether one object is warmer than another object has most to do with molecular
A) kinetic energy.
B) potential energy.
C) masses.
Answer:
Water causes partial melting of the mantle at which type of plate boundary?
A) convergent boundaries
B) divergent boundaries
C) transform-fault boundaries
Answer:
If you wish to spear a small blue fish with a red laser beam, you should compensate for
refraction and aim your laser
A) directly at the sighted fish.
B) above the sighted fish.
C) below the sighted fish.
Answer:
A kg of 40C water and a kg of 20C water, after being mixed, have a temperature of
30C. However, the final temperature of a 1-kg iron block at 40C placed into 1 kg of
water at 20C is
A) less than 30C.
B) at or about 30C.
C) more than 30C.
Answer:
The separation of charges within a polar molecule is called a(n)
A) dipole.
B) dipole-dipole.
C) ionic bond.
D) strong attraction.
E) polar bond.
Answer:
A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting
air resistance, how far downrange will the bullet be 1 s later?
A) 50 m
B) 98 m
C) 100 m
D) 500 m
E) none of the above
Answer:
A star’s size stabilizes when
A) thermal pressure and gravitational attraction balance each other.
B) the star’s gravitational attraction is balanced by the gravitational attraction to
neighboring stars.
C) the star first ignites.
D) it reaches temperatures of about 3 million K.
Answer:
Jogging Jake runs along the top of a moving flatcar in the direction of motion of the
flatcar. If he runs in the opposite direction, the combined momentum of Jake and the
flatcar relative to an observer at rest will be
A) more.
B) the same.
C) less.
Answer:
All of Earth’s weather occurs in the
A) lower levels of the atmosphere.
B) troposphere.
C) tropopause.
D) troposphere and stratosphere.
Answer:
What is the purpose of adding aluminum salts and a base to water during water
treatment?
A) The two together gel and trap dirt and bacteria.
B) The higher pH kills bacteria.
C) The aluminum removes the rust taste from the water.
D) The base dissolves the dirt.
E) It improves the taste.
Answer:
A jack system will increase the potential energy of a heavy load by no more than 1000 J
with a work input of 2000 J. The efficiency of the jack system is at most
A) 10%.
B) 20%.
C) 50%.
D) 80%.
E) not enough information
Answer:
Which type of radiation is being emitted in the following incomplete nuclear equation?
Po → Pb + ??
A) alpha
B) beta
C) gamma
D) A and B
E) none of the above
Answer:
When a gas in a container is squeezed to half its volume at constant temperature, the
gas pressure
A) is half.
B) doubles.
C) quadruples.
D) remains the same.
Answer:
Before ice can form on a lake, all the water in the lake must be cooled to
A) 0C.
B) 4C.
C) a value slightly below 0C.
Answer:
Which of the following would have the highest boiling point?
A) C6H14
B) C8H18
C) C10H22
D) C12H26
E) not enough information given
Answer:
According to Newton, the greater the distance between gravitationally interacting
objects, the
A) less the gravitational force between them.
B) more the gravitational force between them.
C) constancy of the force between them.
Answer:
The natural frequency of an object depends on its
A) elasticity.
B) size and shape.
C) both of these
D) none of the above
Answer:
The average salinity of ocean water is
A) 96.5 parts per thousand.
B) 16 parts per thousand.
C) 35 parts per thousand.
D) 3.5 parts per thousand.
Answer:
A red crab crawling very deep in the water where sunlight is very dim appears
A) red.
B) orange.
C) cyan.
D) brown.
E) black.
Answer:
Which of the following molecules would you expect to be the least attracted to a Na+
ion?
A) H-F
B) H3C-CH3
C) Cl2CH2
D) F–
E) HO–
Answer:
A hot dog pants
A) to help evaporation occur in its mouth and bronchial tract.
B) to bring more oxygen into its lungs.
C) for no particular reasonsome things just happen.
D) to appear sexually appealing.
Answer:
The amount of friction that occurs when two blocks slide against each other depends on
A) how much they are pressed together.
B) the “stickiness” of atoms on their surfaces.
C) the kinds of material being pressed.
D) all of the above
Answer:
Which of the following is not a characteristic of continental glaciation?
A) striations
B) U-shaped valleys
C) drumlins
D) moraines
Answer:
Along with the pH scale, there is the pOH scale, which indicates the level of “basicity”
in a solution. Accordingly, pOH = -log[OH–]. What is the sum of the pH and the pOH of
a solution always equal to?
A) the negative of the product of the hydronium and hydroxide ions
B) the negative log of , which is 14
C) The sum would equal 7, since that would be neutral for pH and pOH.
D) It is not constant because it depends on the acid/base solution in question.
Answer:
The massive ram of a pile driver falling from rest strikes a pile with a speed that
depends on the
A) initial height of the ram.
B) initial potential energy of the ram.
C) distance the ram falls.
D) all of the above
Answer:
Upon ingestion, grain alcohol, O, is metabolized into acetaldehyde, O, which
is a toxic substance causing headaches as well as joint pains typical of a “hangover.” Is
the grain alcohol oxidized or reduced as it transforms into acetaldehyde?
A) The grain alcohol is reduced.
B) The grain alcohol is oxidized.
C) Some of the grain alcohol is oxidized and some is reduced to other products.
D) The grain alcohol is neither oxidized nor reduced.
Answer:
How many oxide ions (O-2) are needed to balance the positive charge of a titanium ion
(Ti+4)?
A) 2
B) 1
C) 3
D) 4
E) 6
Answer:
What direction do the trade winds blow? Is this direction a constant? How do the trade
winds influence ocean circulation?
Answer:
How are electric motors and electric generators similar? Different?
Answer:
In what way could sea level be lowered? How might this affect existing life forms?
Answer:
Why does air pressure decrease with height more rapidly in cold air than in warm air?
Answer:
What is the magnitude and direction of the gravitational force that acts on a person who
weighs 500 N at Earth’s surface?
Answer:
Why is a steam burn more damaging than a burn by boiling water of the same
temperature?
Answer:
Why does quartz sandstone have a high porosity and a high permeability?
Answer:
An unfortunate bug splatters on the windshield of a moving car. Describe the forces,
impulses, momentum changes, and accelerations of both the bug and the car.
Answer:
What is the underlying cause of air motion?
Answer:
What are the processes that transform sediment into sedimentary rock?
Answer:
What is an ore?
Answer:
From first to last, what is the order that Earth’s internal boundary layers were
discovered?
Answer:
What are the three primary colors for light addition? What colors appear when light of
only two primary colors are shone on a white screen? How would the color purple be
produced?
Answer:
When a well is drilled into an aquifer, why does water flow out of the well
spontaneously?
Answer:
What are the limitations in obtaining radiometric dates?
Answer:
What is the significance of the ozone layer?
Answer:
As a river overflows its channel, sediment is deposited along the channel banks. What
type of sediment is deposited first? What type is deposited last?
Answer:
How does energy relate to the way that streams meander?
Answer: