At the end of the Paleozoic era, all
A) dinosaurs became extinct.
B) flowering plants grew to great heights.
C) fish species became extinct.
D) trilobites became extinct.
Answer:
Fossils are found in
A) sedimentary rocks.
B) metamorphic rock.
C) igneous rocks.
D) sedimentary and some metamorphic rocks.
Answer:
The Milky Way galaxy is about
A) 4 light years in diameter.
B) 40 light years in diameter.
C) 100 light years in diameter.
D) 100,000 light years in diameter.
Answer:
A pair of 1-ohm resistors connected in parallel has a combined resistance of
A) 1 ohm.
B) 2 ohms.
C) 1/2 ohm.
D) none of the above
Answer:
A solid has a solubility at room temperature of 78 grams per liter. If 1.0 L of a hot
solution containing 100. g of solute is cooled to room temperature, how much solid is
formed?
A) 22 g
B) 100 g
C) 78 g
D) 1 L
E) 78g/L
Answer:
Which contracts more when the temperature is slightly increased? Equal volumes of
A) iron.
B) wood.
C) ice water.
D) helium.
E) none of the above contract when heated
Answer:
Distant snow-covered hills appear yellowish due to the color of the
A) atmosphere between the observer and the hills.
B) selectively reflected light that reaches a distant observer.
C) reflected light that survives scattering.
D) sky that is reflected off the hills.
Answer:
What does the value of say about the extent to which water molecule react with
themselves?
A) Because the value of is so small, the extent to which water ionizes is quite large.
B) Because the value of is so small, the extent to which water ionizes is quite small.
C) Water molecules react with themselves at a constant rate, never increasing or
decreasing.
D) When an acid is added to water, the value of will decrease.
Answer:
A change in pressure at any point in a confined fluid at rest is transmitted
A) undiminished to all points in the fluid.
B) to points of lower pressure.
C) in the direction of lower energies.
D) all of the above
E) none of the above
Answer:
Which of the following describes an electrode?
A) Any material that conducts electrons into a media where electrochemical reactions
are taking place.
B) Any material that conducts electrons out of a media where electrochemical reactions
are taking place.
C) Any material that conducts electrons.
D) Any material that is undergoing an oxidation-reduction reaction in a battery.
E) either A or B
Answer:
Evaporation and precipitation are greatest over the
A) polar ice caps.
B) continents.
C) oceans.
D) equator.
Answer:
During the Mesozoic, the supercontinent of Pangaea fragmented into
A) Laurasia and Gondwanaland.
B) a rift zone between Africa and Europe.
C) the present-day continents we see today.
D) four quadrants.
Answer:
One of Edwin Hubble’s discoveries is that the known universe is expanding. This means
that
A) most all observable galaxies are moving away from each other.
B) light rays bend as they near the event horizon of a black hole.
C) light rays undergo acceleration as they travel vast distances.
D) the mass of the universe is slowly dissipating.
Answer:
Compressive stress causes rocks to buckle and fold. In a syncline fold, the rocks at the
fold axis (the core) are
A) younger than those away from the axis.
B) older than those away from the axis.
C) more deformed than those away from the core.
D) less deformed than those away from the core.
Answer:
Which has the longest residence time?
A) groundwater
B) rivers, lakes, and streams
C) polar ice caps and glaciers
D) rainwater
Answer:
During the Pleistocene ice age
A) there was one large episode of glacial advance.
B) there were several episodes of glacial advance and retreat.
C) Earth’s entire surface was covered with ice.
D) Earth’s oceans were completely frozen.
Answer:
Our local group is composed of how many galaxies?
A) less than 100
B) less than 400
C) less than 1000
D) 1526
Answer:
There is more gold in 1 km3 of the ocean than the amount of gold mined in all of
recorded history. How come we do not mine the oceans?
A) It is too dilute to separate.
B) It would take too much energy.
C) It would cost too much.
D) all of the above
E) none of the above
Answer:
According to calculations made by modern astronomers, the age of the universe is close
to
A) 14 billion years.
B) 7 billion years.
C) 21 billion years.
D) 6000 years.
Answer:
In a severe drought, groundwater does not get recharged. To get to the groundwater
A) deeper wells must be dug.
B) more water wells are needed.
C) water wells need to be located next to streams.
D) water wells need to be dug at higher elevation.
Answer:
Loudness of sound is most closely related to
A) frequency.
B) wavelength.
C) amplitude.
D) speed.
Answer:
When a boxer moves into an oncoming punch, the force experienced is
A) decreased.
B) increased.
C) no different, but the timing is different.
D) all of the above
Answer:
When evaporation at the ocean surface exceeds precipitation, the salinity of seawater
A) increases.
B) decreases.
C) stays the same.
Answer:
Clouds that begin to develop 6000 meters above the ground are generally
A) stratus and stratocumulus type clouds.
B) cumulus and stratus type clouds.
C) cirrus and cirrostratus type clouds.
D) cumulonimbus and altocumulus type clouds.
Answer:
Of the five rock-forming mineral groupsthe silicates, carbonates, oxides, sulfides, and
sulfateswhich two form economically important ores?
A) silicates and carbonates
B) carbonates and oxides
C) oxides and sulfides
D) sulfides and sulfates
Answer:
Acceleration is greater for a satellite in elliptical orbit when it is
A) closest to Earth.
B) farthest from Earth.
C) the same at both locations
Answer:
A dropped ball gains speed because
A) its velocity changes.
B) a gravitational force acts on it.
C) of inertia.
D) its nature is to become closer to Earth.
Answer:
When most substances are heated, molecules inside move faster and occupy more
space, which results in thermal
A) bending.
B) expansion.
C) contraction.
D) heat.
Answer:
A 1-N-falling apple hits the ground with a force of
A) 1 N.
B) 2 N.
C) 4 N.
D) 10 N.
E) not enough information
Answer: