Question

Define jet stream ?
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Answer 1

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Jet streams are currents of air high above the Earth. They move eastward at altitudes of about 8 to 15 kilometers (5 to 9 miles). They form where large temperature differences exist in the atmosphere. An air current is a flowing movement of air within a larger body of air.

Answer 2

Answer:

1. a narrow variable band of very strong predominantly westerly air currents encircling the globe several miles above the earth. There are typically two or three jet streams in each of the northern and southern hemispheres.

"brief bursts of cold air have been blown into the region by the jet stream"

2. a flow of exhaust gases from a jet engine.

Explanation:

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