What is associated with reversed magnetic polarity?
A. The magnetic signal of seafloor formed with this polarity would be stronger compared to adjacent areas of the seafloor.
B. There are much fewer intervals of reversed polarity than normal polarity.
C. A compass needle would point south.
D. All of these.
Answer: C
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Which pair of processes transforms metamorphic rocks to igneous rocks?
A) application of heat and pressure B) transportation and lithification C) melting and crystallization D) melting and precipitation
What makes light absorption in diatoms more effective than just using chlorophyll?
a. Surface-to-volume b. Microbial loop c. Frustule perforations d. Accessory pigments
A laboratory analysis of index minerals in a metamorphic rock indicates that temperature and pressure were decreasing as a specific mineral was growing. Why would the conditions for mineral growth change?
A. The rock was being uplifted to the surface. B. Hydrothermal fluids were invading the rock. C. A blob of magma was moving toward the rock. D. The rock was being carried downward by subduction. E. The rock was being folded by differential stress.
Other than the west coast and western interior, an earthquake hazard map of the continental United States shows ________ to have the highest probability of strong ground shaking over a 50-year period
A) Florida B) southern Texas C) northern Minnesota D) North Dakota E) the central Mississippi River Valley area