The science of _____ literally means "study of Earth."
geology
The age of Earth is approximately ______
4.5 billion years old
True or False:
Earth consists of four major spheres: hydrosphere, atmosphere, solid Earth, and ecosphere.
False
An understanding of Earth is essential for....
a. minimizing the effects of natural hazards.
b. dealing with the human impact on the environment
c. the location and recovery of basic resources.
d. all of the above
The outer crust of Earth is known as the ______
lithosphere
Which one of the following statements concerning mierals is not true?
a. solid
b. naturally occuring
c. organic
d. deinite chemical structure
The nucleus of an atom contains _____
protons and neutrons
Some of the properties of minerals would include ____
a. streak
b. hardness
c. magnetism
d. all of the above
Atoms of the same element possess the same number of _____.
protons
A "native" element such as copper would be classified as a ____.
nonsilicate mineral
Igneous rocks form from _____ within the earth.
magma
Rock outcrops on earth's surface consist of _____ percent of sedimentary rocks.
75%
An example of a chemical sedimentary rock would be _____
limestone
Two of the most important metamorphic agents are _____
heat and pressure
When magma reaches the earth's surface, it is known as ____
lava
The most important chemical weathering agent is ______
water
Which of the following processes contribute(s) to the breakdown of rock materials?
a. weathering
b. erosion
c. mass wasting
d. all of these
Soils often contain variations and vertical differences observed as general zones or layers called ______
a. vertisols
b. loams
c. horizons
d. residuals
_____ is the interface in the Earth system
soil
The slowest movement of soil and regolith downhill, often characterized by tilting fences is _____
creep
The lowest point to which a stream can erode is ______
base level
The largest reservoir of fresh water that is available to humans is _____
groundwater
Karst topography can include a serious geologic hazard called a _____
sinkhole
Which of the following is not a problem associated with groundwater?
not enough runoff
A name commonly used as synonym for the Ice Age is ____
Pleistocene epoch
A(n) ____ cross-valley profile is typical of canyons and valleys eroded and deepened by alpine or valley glaciers.
U
Desert pavement is the result of ____
deflation
During the most recent ice age, glaciers covered about ____ percent of Eareth's land area.
30%
True or False:
The Basin and Range region of the western United States is an excellent example of a mountains desert landscape.
True
In the early part of the 20th century, ______ argued forcefully for continental drift.
Alfred Wegener
Pull-apart rift zones are generally associated with a _____ plate boundary.
divergent
Which of the following energy sources is thought to drive the lateral motions of Earth's lithospheric plates?
export of heat from deep in the mantle to the top of the asthenosphere
All of the following are evidence supportingthe theory of plate tectonics except for _______
changes in the moon's orbit due to shifting plates
Which of the following is an important fundamental assumption underlying hte plate tectonic theory?
Earth's diameter has been essentially constant over time
Major earthquakes are often followed by somewhat smaller events known as ____
aftershocks
Overall, this type of seismic wave is most destructive.
surface wave
Earthquake zones are closely correlated with _____
plate boundaries
The oceanic crust is ___ in composition
basaltic
The position on Earth's surface directly above the earthquake source is called the ____
epicenter
____ is a major dissolved volatile constituent in both magma and volcanic gases.
water
The most violent volcanic activity is associated with _____
composite cones
Kilauea is an example of a ______
shield volcano
Most of the active volcanoes of Earth are located in a belt known as the ______
Ring of Fire
True or False:
Ash and lapilli are different sized pyroclastic particles.
True
Faults are ___ in rocks along which appreciable displacement has taken place.
breaks
The processes that collectively produce a mountain belt are called ______
orgenesis
A large strike-slip fault that cuts through the lithosphere is a ___ fault.
transfromed
Terranes are accreted crustal blocks that collide with continental margins. At one time the terranes may have been ____.
microcontinents
Fault-block mountains are caused by uplifted normal faults. An example of this type of mountain building is _____.
Grand Tetons
Catastophism _______
was a philosophy that was first expounded by the early Greeks
Consider the names of the eras in the geologic time scale. What is meant by "zoic"?
life; living things
The ____ is the idea or concept that ancient life forms succeeded each other in a definite, evolutionary pattern and that the contained assemblage of fossils can determine geologic ages of strata?
principle of fossil succession
Which of the following is an essential characteristic of an index fossil?
The organism only lived for a short period of geologic time
What is the age of the earth accepted by most scientists today?
4.5 billion years
A worm would stand a poor chance of being fossilized because ______
worms have no hard parts
Which of the following gases was NOT part of Earth's original atmosphere?
oxygen
Which era of geologic time spans about 88% of Earth's history?
Precambrian
Mammals became the dominant land animals during the ____ era.
Cenozoic
The major source of free oxygen in the atmosphere is from _____
green plants
Each continent contains large "core areas" of Precambrian rocks referred to as ____
shields
Which era is sometimes called the "age of dinosaurs?"
Mesozoic
It is thought that submarine canyons on the continental slope have been generated by ____
turbidity currents
Sediments derived primarily from the products of weathering on the continents are called _____.
terrigenous sediment
An echo sounder operatesby measuring the time required for a ______.
sound pulse travels from a ship to the seafloor and back
The oceans cover approximately ____ % of Earth's surface.
70%
The ____ Ocean is largest.
Pacific
"Black Smokers" are associated with ______.
a. mineral-rick waters
b. hot water
c. oceanic ridges
d. all of these
The total amount of solid material dissolved in water is known as ______
salinity
Salinity in the ocean is highest in regions where _____ is high and ____ is low.
evaporation; precipitation
Most marine animals live nearthe surface of the ocean because of ____, which supports photosynthesis by marine algae that form the basis of the food chain.
sunlight
Organisms, such as algae and bacteria, that drift with ocean currents are know as ______
plankton
In the food chain, each feeding stage is called a ____ level
tropic
True or False:
Productivity in the oceans is highest in tropical reasons
False
Which of the following is correct regarding a wave in the open ocean?
water particles move in an almost circular path.
A sandbar that completely crosses a bay, sealing it off from the open ocean is a ____
a. tombolo
b. coastal barrier
c. sea stack
d. none of these
The energy that drives surface ocean currents such as the Gulf Stream comes from _____
prevailing winds
Becuase the Coriolis effect, surface ocean currents are deflected to the _____ of theie path of Motion in the Northern Hemisphere.
right
Large estuaries are more common on a(n) ____ coastline.
submergent
True or False:
Although the Sun influences the tides, its effect is considerably less than the effect of the moon.
True
The troposphere is the boundary between ____.
the tropopause and stratosphere
Ozone is concentrated in the ____
stratosphere
Practically all clouds and storms occur in this layer of the atmosphere
troposphere
The storage of heat in the lower layerof hte atmosphere produced by certain heat absorbing gases is called the _____
greenhouse effect
Earth receives energy from the Sun in this way______
radiation
The 2 most important heat absorbing gases in the loweratmosphere are ____
water vapor and carbon dioxide
The cloud form that is best described as sheets or layers that cover much or all of the sky is termed _____.
stratus
High clouds that form delicate veil-like patches extended wispy fibers are termed ____
cirrus
This cloud may develop and "anvil head".
cumulonimbus
The highest relative humidity is likely to occur ______
around sunrise
True or False:
The capacity of air to "hold" water vapor is temperature dependent.
True
True or False:
When air is cooled to its dew point, the relative humidity is 80%.
False
Closely spaced isobars often indicate on a weather map indicated ____.
high winds
Upper air winds ____.
are generally faster than surface winds.
Low air pressure systems are usually associated with _____
diverging winds
If stormy weather were approaching, the pressure tendency would probably be _____
falling
A Santa Ana (Chinook or Foehn) wind is a ____.
very dry, warm wind flowing down a mountain slope
Fast moving currents of air found near the tope troposphere are called _____.
jet streams
On a weather map ____ fronts are shown by a line with triangular points on one side.
cold
A wind shift from south or southwest ot northwest is commonly associate with the passage of a ____ front.
cold
Which one of the following statements is NOT true of tornadoes?
Usually occur along the warm front of a mid-latitude cyclone
Typhoon is another name for a ____
hurricane
True or False:
Warms fronts generally have sleeper slopes than cold fronts
False
True or False:
Thunder is produced by lightning.
True
Which of the following is considered to be a boundary between two different air masses?
both warm and cold fronts
The first modern astronomer to propose a Sun-centered universe was ______
Nicolaus Copernicus
This scientist determined the nature of the forces that kept the planets in their orbits.
Sir Isaac Newton
3 laws of planetary motion were discovered by _____
Johannes Kepler
The belt of constellations through which all the planets move is called the _____
zodiac
The apparent westward drift of the planets as compared to the background stars is called _____
retrograde motion
True or False:
The ancient Greeks proposed an Earth-centered view of the universe.
True
True or False:
The planets maintain circular orbits around the Sun.
False
T or F:
Galileo discovered that the Sun has "blemishes," which we call sunspots.
True
T or F:
Galileo discovered Jupiter's four largest moons.
True
T or F:
The moons rotation is very similar in time it's revolution around earth
True
Pluto is now classified as a ____ in our solar system.
dwarf planet
The ____ explains how our solar system probably formed from a giant cloud of gases and dispersed solid particles.
nebular hypothesis
As the solar system was forming, ______ came closest to undergoing nuclear fusion and becoming a second sun.
Jupiter
______ has the great, dark spot on its surface.
Neptune
How did the lunar maria most likely originate?
huge impact basins that were nearly filled with basaltic lava flows
____ are found both on Mars and Earth.
Erosional feartures related to flowing water
Which one of the following is NOT true of Jupiter?
a rotational speed slower than Mercury
____ has atmospheric pressures at its surface that are roughly comparable to those at Earth's surface.
Saturn's moon Titan
___ has a hot, turbulent atmosphere dominated by carbon dioxide.
Venus
____ is the principal gas in the Venusian atmosphere and also a minor component of the atmospheres of Earth and mars.
Carbon Dioxide
Which one of the terrestrial planets has a surface landscape similar to that of the older areas of the Moon?
Mercury
The belt (orbit) of the asteriods is located between ____
Jupiter and Mars
The first person to use a telescope for astronomical observations was ___
Galileo
The layer of the Sun that radiates most of the light that reaches Earth is called the _____
photosphere
The outermost layer of the Sun is called the _____.
corona
The source of the Sun's energy is _____
nuclear fusion
The most conspicuous features on the surface of the Sun are dark areas called _____.
sunspots
Streams of protons and electrons emitted from the Sun produce ____
the solar wind
During periods of high solar activity, huge cloudlike structures that appear as great arches extending from the Sun are often produced. These solar features are called _____.
prominences
T or F:
Blue stars are cooler than red stars
False
T or F:
In the case of light, when a source is moving away, its light appears redder than it actually is.
True
T or F:
The sun is considered an "average star"
True
Our galaxy is called the ____
milky way galaxy
Which main-sequence stars are the most massive?
blue
Which main sequence stars are the least massive?
red
Possibly the most cataclysmic event to occur in nature is ____
hydrogen burning
The most dense stars known to exist are ____
black holes
These stars are produced during a supernova event
black hole
A star in which light cannot escape because of the immense gravitational pull at its surface is called a ______
black hole
The Sun belongs to this class of stars.
main-sequence star
The point in stellar evolution when a star has used up all its fuel and is radiating away its remaining thermal energy as light is the ___ stage.
white dwarf
Most stars are in this stage of evolution.
main-sequence star
The final stage for a star which is as massive as the Sun is a ____
black dwarf
When a main-sequence star has exhausted the fuel in the inner region, it becomes a ____
red giant
Hubble's law states that galaxies are receding from us at a speed that is proportional to their ____
distance
The discovery that the universe appears to be expanding led to a widely accepted theory called _____
the Big Bang
Based on the observed red shifts in the spectral lines of distant galaxies, astronomers conclude that _____