Compared with equatorial open ocean waters, open ocean water in the northern Pacific
A) is colder and less dense.
B) has a higher salinity content.
C) is colder and more dense.
D) has a lower salinity content.
Answer:
The Cretaceous extinction that wiped out 60% of Earth’s species (including the
dinosaurs) is attributed to
A) the break-up of Pangaea.
B) meteorite bombardment.
C) massive volcanic eruptions.
D) all of the above
Answer:
The two most common igneous rocks are basalt and granite. Basalt is commonly found
________, and granite is found ________.
A) on the ocean floor; on the continents
B) on both the ocean floor and continental land; only on the continents
C) on the continents; on the ocean floor
D) on the ocean floor; on both the ocean floor and on continental land
Answer:
Daisy weighs 120 N and carries Trixie who weighs 40 N on her back. The support force
on Daisy’s feet is
A) 40 N.
B) 120 N.
C) 160 N.
D) more than 160 N.
Answer:
As a distributary channel in a delta becomes choked with sediment, the water in the
channel
A) disappears.
B) will find a new route to its destination.
C) will puddle and eventually form a lake.
D) will move back upstream.
Answer:
The Earth rotates about its axis once per 24 hours, while the Moon rotates about its axis
once per
A) 24 hours also.
B) half month.
C) month.
D) year.
E) none of these
Answer:
A four dimensional image of a coffee table is depicted in a
A) tesseract.
B) video.
C) photograph.
D) hologram.
Answer:
We feel uncomfortably warm on a muggy day because water molecules are
A) evaporating from our moist bodies.
B) condensing on our bodies.
C) preventing the evaporation from our moist bodies.
Answer:
The two ways that glacial drift is deposited are
A) as outwash and till.
B) laminar and turbulent.
C) as crevasses and meltwater.
D) ablation and accumulation.
Answer:
If the pH of a solution is 10, what is the hydroxide ion concentration?
A) 1 10-4 M
B) 4 M
C) 14 M
D) -14 M
E) -1 1014 M
Answer:
A constant net force on a railroad car produces constant
A) velocity.
B) acceleration.
C) both of these
D) neither of these
Answer:
Complementary colors are two colors that
A) share the same color scheme.
B) are additive primary colors.
C) are subtractive primary colors.
D) produce white light when combined.
Answer:
All of the stars we see at night with our unaided eyes are within
A) 10,000 light-years, which is a small portion of our galaxy.
B) 100,000 light-years, which encompasses most all of our galaxy.
C) 5 million light-years, which encompasses our local group.
D) 14 billion light-years, which encompasses the observable universe.
Answer:
How is Avogadro’s number related to the numbers on the periodic table?
A) The atomic mass listed is the mass of Avogadro’s number’s worth of atoms.
B) The masses are all divisible by Avogadro’s number, which gives you the weight of
one mole.
C) The periodic table tells you the mass of one atom. From that, and Avogadro’s number
you know the number of moles.
D) The periodic table only gives us atomic numbers, not atomic mass.
E) The mass listed is Avogadro’s number.
Answer:
Given that two forces of 10 N and 15 N act horizontally on an object, the net force must
A) be 5 N.
B) be 25 N.
C) be either 5 N or 25 N.
D) lie between 0 N and 25 N.
Answer:
A general rule for estimating the distance in kilometers between an observer and a
lightning bolt is to count the number of seconds between seeing the lightning and
hearing it, and dividing by
A) 2.
B) 3.
C) 4.
D) 5.
E) none of the above
Answer:
Cells at the top of a tree have a higher concentration of sugars than cells at the bottom.
How might this fact assist a tree in moving water upward from its roots?
A) Cells with high concentrations of sugar are more dense. As these cells migrate
downwards, cells containing fresh water are able to migrate upwards.
B) Water is pushed upwards by osmostic pressure.
C) It doesn’t. In fact, water makes it to the top of a tree because that is where the water
molecules are being evaporated.
D) Fresh water is drawn upwards to the sugar containing cells by way of dipole-dipole
molecular interactions.
Answer:
If a non-rotating object has no acceleration, then we can say for certain that it is
A) at rest.
B) moving at constant non-zero velocity.
C) in mechanical equilibrium.
D) all of the above
E) none of the above
Answer:
Which pulls on the oceans of Earth with the greater force?
A) the Moon
B) the Sun
C) The Sun and the Moon both pull the same.
Answer:
An important condition for the operation of the Falkirk Wheel is that
A) water in each caisson have the same depth.
B) ships carried are more or less equal in weight.
C) no water spill when a ship enters a caisson.
D) all of the above
E) none of the above
Answer:
Which of the following would be considered a chemical property?
A) reactivity towards water
B) melting temperature
C) boiling temperature
D) conductivity
E) flexibility
Answer:
The three sources that brought young Earth to its melting point were
A) impact heating, convection heating, radiometric heating.
B) impact heating, gravitational contraction heating, radioactive decay heating.
C) impact heating, convection heating, radioactive decay heating.
D) collisional heating, contraction heating, radiometric heating.
Answer:
Which of the following nuclear equations correctly describes alpha emission?
A) U → Th + He
B) U → U + He
C) U → Pu + He
D) U → He
E) none of the above
Answer:
An assumption that Earth processes occurring today have always occurred is called
A) the principle of superposition.
B) uniformitarianism.
C) the principle of original horizontality.
D) theory of unconformity.
Answer:
The higher the temperature of an object, the
A) longer the wavelengths it radiates.
B) shorter the wavelengths it radiates.
C) none of the above
Answer:
Escape speed for a rocket is greatest from
A) Earth.
B) the Moon.
C) the Sun.
D) same for each
Answer:
Nellie whirls a tether ball in a horizontal circular path over her head. If the action force
is Nellie pulling on the string, the reaction force is
A) Nellie pulling on the string.
B) the string pulling on Nellie.
C) the ball pulling on the string.
D) none of the above
Answer:
Which of the following solutions is the most acidic?
A) a solution with a pH = 14
B) a solution with a pH = 10
C) a solution with a pH = 7
D) a solution with a pH = 4
E) All of the solutions are basic.
Answer:
Compared with the mass of an apple on Earth, the mass of the same apple on the Moon
is
A) less.
B) more.
C) the same.
Answer:
An ice cube floating in a glass of water contains many air bubbles. When the ice melts,
the water level
A) rises.
B) falls.
C) remains unchanged.
Answer:
Phil Physiker standing at the edge of a cliff throws one ball straight up and another ball
straight down, both with the same speed. Both balls hit the ground at
A) different speeds.
B) the same speed in the same time.
C) the same speed in different times.
D) none of the above
Answer:
As a star undergoes collapse, its rate of rotation
A) decreases.
B) increases.
C) remains constant.
Answer: