Australia once had 20,000 square km of wetlands. Now they have none
Indicate whether this statement is true or false.
TRUE
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Which of the following describes the likely formation of occluded fronts?
A. A cold front overtakes a warm front. B. A warm front overtakes a cold front. C. Overrunning occurs along a warm front. D. A cold front overtakes a squall line.
Geomagnetic reversals________________________
a) provided strong evidence for seafloor spreading b) caused all the mass extinctions in recorded geologic history c) destroyed compasses ane electronic equipments d) confirmed the existence of subduction zones e) cause the movements of plates
A glacial landform that forms at the head of glacial valleys or troughs is called a(n) ____
A)roche moutonée B)esker C)kame D)arête E)cirque
?Match the term with the correct description.
A. ?population projected to triple between by 2050 B. ?makes up about 25% of the U.S. population C. ?country with the world's highest percentage of people age 65 and older D. ?the world's fourth largest economy E. ?world's most populous country