Compared to oceanic crust, continental crust is thicker and less dense
a. True
b. False
Indicate whether the statement is true or false
True
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Read the following paragraph to answer the question:The Mt. St. Helens eruption in Washington state in 1980 measured 5 on the volcanic explosivity index (VEI). Only 57 people died from the Mt. St. Helens since most people were warned to evacuate the area prior to the event. Four years later, in 1985, Nevado del Ruiz in Colombia erupted. While only measuring 3 on the VEI, the eruption resulted in 25,000 deaths when unsuspecting residents of local towns were overrun by fast-moving lahars.How much more volcanic material was released by the Mt. St. Helens eruption compared to Nevado del Ruiz?
A. Ten thousand times more B. A hundred times more C. Ten times more D. Twice as much
Which of these landscapes is not present in Namibia?
A) Swamps B) Desert C) Grasslands D) Mountains
Which of the following is not a reason that poor families in developing countries might have many children?
A) Children are helpers for essential chores on the farm. B) Most children survive beyond one year. C) high mortality among the young D) to assure care of parents in their old age E) The more males born to a family, the better it is for managing the family farm or business.
Environmental economists
A. view the earth's natural capital as a subset of human economic systems. B. advocate refining existing economic systems to be sustainable systems of the biosphere. C. see the potential of economic growth as unlimited. D. believe high waste economies are desirable as long as waste and pollution are managed. E. prioritize the efficient flow of resources as inputs to economic systems.