Porphyritic texture indicates:
a. slow, gradual cooling
b. rapid cooling
c. slow cooling, followed by rapid cooling
d. rapid cooling, followed by slow cooling
c
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What is the theory of plate tectonics?
A) Earth is made up of a large number of geological plates that move slowly across its surface. B) The number of tectonic plates equals the number of continents on Earth. C) Human activities are changing Earth's surface. D) Earth was created 6,000 years ago. E) Earth's continents are moving closer together.
Each different __________ on Earth is identified by the dominant vegetation types that are a function of climate.
Fill in the blank(s) with the appropriate word(s).
Centrifugal force
A) is always aimed inward. B) is a major factor in the movement of all winds, weak and strong. C) acts in opposition to pressure gradient force in Northern Hemisphere cyclones. D) is essentially the same as the Coriolis force. E) all of the above
Captain James Cook returned to England after his final expedition in 1779 and recorded a 50-volume set of
reports of his scientific findings. a. True b. Fals