The unique preservation of soft-bodied fauna in the Burgess Shale occurred because ____
a. animals and plants were carried by turbidity flows to aerobic deep-sea conditions
b. animals and plants were transported and buried in anaerobic conditions
c. bacteria were able to destroy organisms at the burial site
d. the organisms were neither compressed nor compacted
e. animals with hard parts were deposited immediately above the shale
b
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A scientific law may begin as a hypothesis that
A. a large group of competent observers agree as true. B. is tested repeatedly and not contradicted. C. both of these D. none of the above
Which of the following is a valid statement about how rocks respond to stress?
A. Stress can cause a rock to be displaced, but not rotated. B. If the stress is very high, the rock will be unchanged. C. A rock can be displaced or strained but not both at the same time. D. If a rock has strained, then it has changed its size or shape.
The Hawai'ian Islands were formed as a result of
A) a rising plume of magma from the mantle. B) an oceanic-oceanic plate collision. C) a continental-oceanic plate collision. D) activity along a mid-ocean ridge.
By the end of this century, polar bears might be found only in ___________
Fill in the blanks with correct word