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PSC1121 CH15-18

QuestionAnswer
T/F. Molten rock material from which minerals can crystallize is called magma. True
T/F. Basalt and granite are examples of metamorphic rocks. False
The most common rock type in Earth's crust is ____________. A) igneous
The formation of which of the following rocks helps remove CO2 from the atmosphere? B) limestone
Which of the following statements about Earth's core is true? D) The core is mostly made of iron.
The least dense rocks in Earth are found in __________. A) the continental crust
According to the plate tectonics theory, sea-floor spreading occurs at a _______. C) divergent boundary
The San Andreas Fault is the site of a _________. B) transform boundary
The Himalayan Mountains were formed as a result of ____________. C) continent-continent plate convergence
The driving force behind the movement of oceanic and continental plates may be _. D) convection cells within the mantle
T/F. The principle of uniformity states that past geologic processes were very much similar to those of the present True
T/F. Each higher number on the Richter scale represents a 10-fold increase in the amount of ground movement in an earthquake True
Weathering involves the ________. C) mechanical and chemical breakup of rocks
Which of the following statements about a meandering stream is true? D) Meanders result in the widening of a valley floor.
The point of initial rock movement along a fault during an earthquake is called the ___________. B) focus
Which sequence of processes occurs in the correct order? A) weathering, erosion, transportation
When a stream flows into a body of water it often forms a _____. A) delta
Glaciers form when ________. B) snow accumulates to form ice, which begins to flow
A stream in its youth exhibits which of the following sets of characteristics? C) steep gradient and a V-shaped valley
Seismic waves are produced when rocks __________. C) rupture or break under stress
T/F. Earth's atmosphere is composed chiefly of nitrogen, oxygen and carbon dioxide. False
T/F. The atmospheric heating produced by the absorption of solar radiation and reemission of infrared radiation is called the greenhouse effect. True
The wind chill factor _____. A) measures the effect of low temperature and wind on humans
The chief difference between fog and a cloud is __________. D) the altitude of the tiny water droplets
A parcel of air that rises undergoes _________. B) cooling by expansion
A warm front forms when _________. D) a warm air mass advances over a mass of cooler air
There are greater temperature extremes in North Dakota than in the state of Washington because ______. C) there is no ocean near North Dakota
On the eastern side of mountains in Oregon and Washington the air tends to __. A) be warm and dry
Which of the following is not considered to be a form of precipitation? B) dew
A psychrometer measures ______. A psychrometer measures ______.
T/F. The water that evaporates from lakes and streams is fresh, whereas water evaporating from the oceans is salty. False
T/F. Ocean waves transport objects that float toward the shore. False
T/F. Tidal waves are actually not associated with tides or tide-making processes. True
Of the total water supply, what is the amount that is available for human consumption and agriculture? A) less than 1%
Compared to the amount of surface water the amount of water stored in groundwater is _______. D) roughly 25 times as great
The largest freshwater reservoir in the world is _______. D) glaciers and ice caps
The two most common ions in seawater are sodium and _______. A) calcium
A current that moves parallel to the shore in the surf zone is called a _____. B) longshore current
Surface ocean currents are generally driven by ______. A) the prevailing winds
About what is the average concentration of salts in Earth's oceans? B) 3.5%
Created by: SKloorfain
 

 



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