What is the approximate length of time preserved in Grand Canyon rocks?
a. 10,000 years
b. 100,000 years
c. 1 million years
d. 1 billion years
e. 10 billion years
Answer: d. 1 billion years
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Which one of the following would be a physical component of the desert ecosystem of the southwestern United States?
A) Cacti B) Ferns C) Deer D) Rocks
Both the annual and the daily ranges of temperature are larger in continental locations than in marine locations
Indicate whether the statement is true or false
The difference between active and passive remote sensing systems is that
A. active systems emit their own energy while passive systems simply detect existing energy signals. B. active systems can operate throughout cloud or fog cover while passive systems require clear sky conditions. C. active systems involve the latest generation of satellites while passive systems use signals from older satellites. D. active systems include aerial photography while passive systems rely on satellite imagery.
The few trees in an area of midlatitude grassland biome probably would be ________
A) conifers B) hygrophytes C) riparian D) nomadic E) lost