Question

weather and barometers
a barometer drops quickly. this likely means:
a) rising air pressure; clear weather ahead
b) falling air pressure; storm likely
c) no change in pressure; no change in weather
d) air pressure is higher on mountains
key: b (falling pressure often signals storms)

Explanation:

A barometer measures air pressure. A rapid drop in air pressure often indicates an approaching storm. Rising air pressure usually means clear weather, while falling air pressure is associated with stormy conditions. No change in pressure typically means no change in weather. Higher air pressure on mountains is a less common and less relevant option compared to the general weather - pressure relationship.

Answer:

B. Falling air pressure; storm likely