•give an example of a scientific theory that has changed. did it become a scientific law, become obsolete, or become part of a revised scientific theory?

An example would be Fleischmann-Pons's nuclear fusion theory, this theory tested the effects of what is known as "Cold Fusion", but when other scientists performed similar experiments they didn't achieve similar results, therefore making the theory obsolete.

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds