What is a jet stream?

Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. The words blow from west to east in jet streams but the flow often shifts to north and south. Jet streams follow the boundaries between hot and cold air. The earth's rotation is responsible for the jet stream as well.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

b - the respond is innate and varies over time.

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