How were early civilizations in the Americas, Africa, and Europe both similar and different."

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

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

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."