What is phyletic gradualism?
Phyletic gradualism is the concept that evolution occurs because of minor changes that eventually bring about changes from one species to another.
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Using the 5-year moving average lines for reference, in which of the cities does average annual temperature fluctuate the most from one year to the next or from one decade to the next?
The question is based on Figure 24-6, a chart showing average annual temperature from 1905 to 2015 in three U.S. cities: Nome, Alaska; Bozeman, Montana; and Tucson, Arizona. What will be an ideal response?
The mountain building events of the west coast that began in the Jurassic and continued into the Cenozoic are
collectively called the ____. a. Sonoma orogeny b. Antler orogeny c. Cordilleran orogeny d. Rocky Mountain orogeny e. Alleghenian orogeny
Geologists in the early 1900s concluded that heat flow through continents should be greater than heat flow through ocean floors. Evaluate this hypothesis
A) True. The granite of the continental crust contains more radioactive elements than the basalt of the ocean floor, so more heat is produced in continental crust. B) True. Continental crust is thicker than ocean crust, so more heat is produced in the thicker layer. C) False. The lithosphere is thinner beneath oceans than continents, so heat flows more easily up from the mantle. D) False. The basalt of the ocean floor has a better insulating quality than continental crust granite.
What is significantly responsible for the formation of horizontally expansive underground limestone caverns?
A. persisting snow cover B. extensive bedding planes C. low-lying basin landscapes D. nearby geothermal features E. dense vegetative cover