The stability of the air layer close to the earth's surface can vary markedly. Much of this variation is caused by:
A) changes in wind direction. B) changes in wind speed.
C) changes in pressure. D) changes in heating or cooling of the surface.
Question 2
The name of the instrument being launched with a weather balloon in the photograph above is:
A) a satellite. B) a TRMM sensor. C) a Doppler radar. D) a radiosonde.