The El Niño phenomenon takes place every 4-7 years. At this time, the usual UPWELLING along the western coast of South America does not occur. What could cause this? (HINT – The Trade Winds blow from east to west)

How did geographic isolation affect the islands in the australasia ecozobne?

Which of the following statements best describes what is occurring in the land surrounding the sahara desert? a desertification is increasing, and the desert is expanding. b. fewer people are trying to farm in this semiarid region. c. the desert is shrinking with the increased use of irrigation. d. increased urbanization has resulted in decreased deforestation. select the best answer from the choices provided mark this and return save and exit next submit

What is the thickest layer of earth called?