Explain how spheroidal weathering occurs. What will be an ideal response?
Jointed masses of rock tend to be broken up into blocks. This increases the surface area that can be
affected by chemical weathering. The corners of blocks have three surfaces compared to two for edges
and one for sides. Because of this, the corners weather faster than the edges, which in turn weather
faster than the sides. The resulting weathering surface becomes spherical, from which the word
spheroidal is derived. Spheroidally weathered rock masses have a concentrically layered appearance.
Many times, the original shape of the individual blocks can still be seen.
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If there was once one supercontinent over 200 million years ago, then there was a single ocean called ____
A) ?Pangaea B) ?Panthalassa C) ?Oceanus D) ?Tethys
The lowest temperature that can be attained by evaporating water into the air is known as the?
a. heat index.? b. ?minimum temperature. c. ?wet-bulb temperature. d. ?frost point. e. ?wind chill temperature.
Carbonation most commonly impacts:
a. quartzite. b. shale. c. limestone. d. granite. e. basalt.
Global positioning systems (GPS) can "know" their location by
A. relating changes in detected radiation to changes in the position of the Sun. B. continually measuring changes in angle to a stationary reference point, such as a streetlight, in the area of the receiver. C. relating slight changes in magnetism and gravity to changes in the distance and direction of movement from the point at which the location of the receiver was last calibrated. D. measuring the time required for radio signals from four or more satellites to reach the receiver.