What evidence first indicated to scientists that the continents were once connected?
a. the apparent jigsaw-like fit of continents together, as in the case of South America and Africa
b. the distribution of coal from tropical swamps of the past among North America, Europe, northern Africa, and Asia
c. deformed igneous rocks in Brazil that highly resembled similar rocks in Africa
d. the presence of Glossopterison fossils on five different continents
e. the evidence of past isthmian links which allowed land animals to reach other landmasses across the ocean
a. the apparent jigsaw-like fit of continents together, as in the case of South America and Africa
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The largest contributor to industrial solid waste in the United States is the ____ industry.
A. lumber B. fast food C. mining D. clothing E. steel
During what period were efforts to improve transportation concentrated on expanding the known seas and improving ships?
A) during the Civil War era B) just before World War I C) before the Industrial Revolution D) the middle of the Renaissance E) just after the Reformation
Within the United States, which area has the highest earthquake hazards?
A) West Coast B) East Coast C) Mid-continent. D) Gulf Coast
Australia is one of the most arid places on earth, with two-thirds of the country receiving less than ________ inches of rainfall annually
A) 30 B) 20 C) 35 D) 40 E) 50