Answer:
There are 37 time zones in place today
Answer: "hydrologic cycle" .
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Social, cultural and economic factors influence fertility, mortality and migration rates. Migration is affected by various factors like age, sex, marital status, education, occupation, employment etc. Age and sex are main demographic factors that affect the migration.
There are five basic kinds of mountains:
Fold Mountains (Folded Mountains)
Fault-block Mountains (Block Mountains)
Dome Mountains.
Volcanic Mountains.
Plateau Mountains.
The contiguous United States are framed by three major bodies of water: the Atlantic Ocean on the east coast, the Pacific Ocean on the west and the Gulf of Mexico to the south. The Pacific also holds the Hawaiian Island chain. The Gulf stretches from Texas to Florida and also touches Alabama, Louisiana and Mississippi.
