A uranium-lead age determined from a zircon crystal removed from a sandstone would reflect the time elapsed since the ________ of the zircon
A) erosion
B) deposition
C) crystallization
D) cementation
Answer: C
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Which of the following could be responsible for the most recent warming trend in the northern hemisphere?
A. increase in levels of CO2 B. increase in volcanic eruptions C. light-coloured particles in the stratosphere D. decrease in energy emitted by the sun
The most notable trace in the geologic record of human activities is likely to be a(n) ____
a. more diverse pollen record b. concrete and metal debris field left from cities c. expansion of farmland d. increase in carbon dioxide levels, as recorded by ice cores e. more alkaline ocean
Above which type of plate tectonic boundary is Mount Rainier located?
A. transform B. convergent C. divergent
What is an advantage of using scientific names?
A) There is only one name per species. B) They are universal to all languages. C) They can indicate the relatedness of organisms. D) All of these choices