What is the main reason our knowledge of the Earth increased dramatically starting in the 1950s?
A. The cold war started.
B. More scientists started studying the Earth.
C. Improved technologies provided more data.
Answer: C
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What are the basic differences between the disciplines of physical and historical geology?
A) Physical geology is the study of fossils and sequences of rock strata; historical geology is the study of how rocks and minerals were used in the past. B) Historical geology involves the study of rock strata, fossils, and geologic events, utilizing the geologic time scale as a reference; physical geology includes the study of how rocks form and of how erosion shapes the land surface. C) Physical geology involves the study of rock strata, fossils, and deposition in relation to plate movements in the geologic past; historical geology charts how and where the plates were moving in the past. D) none of the above
Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.
A. group B. period C. row D. textbook E. compound
The most voluminous layer of Earth is the
A) crust. B) mantle. C) outer core. D) inner core.
A small event that typically occurs before a major event is called a(n) _______________ event.?
Fill in the blank with correct word.