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14 Cards in this Set

  • Front
  • Back
Active mountain belts are most likely to be found _______
along the margins of continents
The annual per capita consumption of metallic and non-metallic mineral resources in the United States is nearly ____ tons.
11
Roughly what percentage of the earth's surface is covered by oceans?
71%
The earth is approximately ___ billion years old?
4.6
The world reached the population of 1 billion in the year ____
1800 A.D.
By the year 2008 the world population is expected to reach nearly
8 billion
Mechanisms that enhance or drive change are known as ____.
positive feedback mechanisms
the continental shelf is located _____
between the continental rise and the abyssal plains
the composition of the core of Earth is thought to be
solid iron-nickel alloy
Which branch of sccience is generally divided into two broad divisions, physical and hsitorical
geology
The four sciences that comprise earth science are:
geology, meteorology, astronomy, oceanography
A ... is a well tested and widely accepted view that best explains certain scientific observations
theory
The four spheres of the earth are the
geosphere, atmosphere, hydrosphere, biosphere
A group of interrelated, interacting, or interdependent parts that form a complex whole is knon as a _____
system