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)

In 1915 the german geologist and meteorologist alfred wegener first proposed the theory of continental drift, which states that parts of the earth's crust slowly drift atop a liquid core. the fossil record supports and gives credibility to the theories of continental drift and plate tectonics.

In the developed world, describe the changing role of women in agriculture.

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky