Why might the temperature of air in a valley be slightly higher than in the surrounding, higher elevation area? why might it be lower? (for your answer, ignore differences that might be caused by differences in solar radiation, cloud cover, shade, or surface materials.)

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

Largest layer of atmosphere international space station orbits ultraviolet radiation causes ionization the phrases describe what layer of earth's atmosphere?

Arow of elements on the periodic table is called an