How do detrital sedimentary rocks differ from chemical sedimentary rocks? What will be an ideal response?
Detrital sedimentary rocks are made from the fragments of preexisting rocks. The cement may be new
material, but otherwise the material forming them predates the formation of the rock. Chemical
sedimentary rocks precipitate from a solution; they are made of new material that forms for that rock
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The late-18th-century Pacific voyages of Captain Cook helped increase the popularity of tattooing among Westerners.
a. true b. false
The cost of natural disasters averaged over the previous ten years has ____ due in part to ____
a. ?increased; increased population and economic growth b. ?decreased; improved forecasting and public awareness c. ?remained constant; equilibrium between population growth and mitigation d. ?increased; population growth only e. ?decreased; increased migration out of hazardous areas
Despite the loss of grasses in African savannahs resulting from competition from the invasive Sodom apple, elephants may help restore savannah communities because
A) their dung helps fertilize savannah plants. B) they no longer feed on savannah grasses. C) they eat the Sodom apple preferentially, which is toxic to most other species. D) they uproot Sodom apples as they seek the grasses they prefer.
Amplitude is the height of a seismic wave and is directly related to the amount of ground movement
Indicate whether the statement is true or false