Discuss the use of fossils to determine the depositional environment of a sedimentary stratum. Give examples of some
fossils that imply a specific environment. Fill in the blank(s) with the appropriate word(s).
The student should discuss the environments that specific fossils lived in. For example, corals
commonly are found in organic reef environments. Clams with thick shells commonly
inhabited shallow, turbulent water. Worms that produce trace fossils in the form of worm
tubes commonly lived in sediments below marine environments. Some fossil organisms lived
exclusively in continental, transitional, or marine environments.
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Ninety percent of the world's population growth in the next century is expected to occur in
A. India B. China C. Less-developed countries D. Developed countries E. Moderately developed nations
Carbon dioxide reacts with water to form
A) carbon dioxide and water. B) carbonic acid. C) sodium bicarbonate. D) hydrated carbon.
Why is the ozone layer important?
a. It insulates Earth. b. It increases the temperature. c. It protects Earth from ultraviolet rays. d. It stabilizes the atmospheric layers.
Nellie whirls a ball in an overhead circular path. If the action force is Nellie pulling on the string, the reaction force is
A. the ball pulling on the string. B. Nellie pulling on the string. C. the string pulling on Nellie. D. none of the above