Multiple choice

Fast moving currents of air that occur above the friction layer are called

  1. mesocyclones

  2. wind trains

  3. jet streams

  4. chinoks

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Jet streams are narrow, fast-moving air currents in the upper atmosphere (above friction layer). They flow west to east and steer weather systems. Mesocyclones are storm rotations; 'chinoks' should be 'chinooks' (foehn winds).