A food scientist is designing an experiment about the factors that affect
the taste of fruits. He's struggling with
how he should write the hypothesis. These
are some of the ideas he came up with:

We can’t really help considering you didn’t finish what you were saying.

Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. the winds blow from west to east in jet streams but the flow often shifts to the 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.