Question 1 of 5 Which two statements best describe jet streams in the northern hemisphere?
A. The polar jet stream separates colder air near the pole and
warmer air to the south.
B. The subtropical jet stream separates warmer air near the equator
and cooler air to the north.
C. The subtropical jet stream causes ocean currents to form near
the equator.
D. The polar jet stream circulates air between the north pole and the
south pole
SUBMIT

B. The subtropical jet stream separates warmer air near the equator

and cooler air to the north.

Explanation:

At most times in the Northern and Southern Hemispheres, there are two jet streams: a subtropical jet stream centered at about 30 degrees latitude and a polar-front jet stream whose position varies with the boundary between polar and temperate air.

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. Since these hot and cold air boundaries are most pronounced in winter, jet streams are the strongest for both the northern and southern hemisphere winters.

Jets streams play a key role in determining the weather because they usually separate colder air and warmer air. Jet streams generally push air masses around, moving weather systems to new areas and even causing them to stall if they have moved too far away.

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