Question

question 19
upper level air flowing out of a trough will favor a ____ at the surface.
a low pressure center
b high pressure center

question 20
surface winds spiral inward toward a ____.
a low pressure center
b high pressure center

Explanation:

For Question 19: When upper - level air flows out of a trough, it creates a situation where more air is leaving the upper levels. To maintain balance, air from the surface will rise to replace the outflowing upper - level air. As air rises from the surface, the pressure at the surface decreases, favoring the formation of a low - pressure center.
For Question 20: In a low - pressure center, the pressure gradient force causes air to move towards the center (since air moves from high to low pressure). Due to the Coriolis effect (in the Northern Hemisphere, it causes a counter - clockwise rotation and in the Southern Hemisphere, a clockwise rotation), the surface winds spiral inward towards the low - pressure center. In a high - pressure center, air moves outward.

Answer:

Question 19: A. Low Pressure Center
Question 20: A. Low Pressure Center