Which of the following technologies has seen the lowest use in the U.S. so far for passenger vehicles?
A) hydrogen fuel cell
B) ethanol
C) hybrid
D) electric
E) diesel
Answer: A
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Because their energy dissipates rapidly in deep ocean waters, tsunamis seldom pose any danger to coastal areas far away from the causative earthquake.
a. true b. false
Many residents of the dreary downtown of European cities are persons of color or recent immigrants from Africa or Asia, who face discrimination and prejudice by "native" Europeans
Indicate whether the statement is true or false.
Shearing causes parts of a body to move or slide relative to one another across a plane.
Answer the following statement true (T) or false (F)
How do scientists use lake sediments to study past climates?
A) Lake sediments contain organic materials that can be identified to species and radiocarbon dated, thereby giving insight into past plant communities and related climatic conditions. B) Isotopic analysis of the relative proportions of 18O to 16O enable determination of evaporation rates from ancient lakes. C) During warmer conditions, lake sediments form wider rings, whereas in cooler conditions, these rings are narrower. D) The amount and type of pollen in lake sediments is an indication of the macrovertebrate assemblages that dominated an area. E) Lake sediment analysis is used to determine which fish species have persisted in a particular lake over long periods of time.