Question

how does air pressure affect weather?
a. high air pressure always brings rain
b. high air pressure brings calm weather
c. air pressure has no effect on weather
d. low air pressure prevents storms
how does wind form?
a. when air moves from areas of high pressure to areas of low pressure
b. when temperature remains constant
c. when humidity levels are low
d. when there is no air pressure

Explanation:

• For the first question: High - pressure systems are associated with sinking air. As air sinks, it warms and dries, which inhibits cloud formation and precipitation, leading to calm weather. Low - pressure systems are associated with rising air, which cools and condenses to form clouds and often precipitation. So, high air pressure does not always bring rain (a is wrong), air pressure does affect weather (c is wrong), and low air pressure is often associated with stormy weather (d is wrong).
• For the second question: Wind is the movement of air. Air moves from areas of high pressure to areas of low pressure. Temperature differences cause pressure differences. When temperature is constant (b), there is no pressure gradient to drive wind. Low humidity (c) does not cause wind. And there is always air pressure in the atmosphere (d is wrong).

Answer:

1. B. High air pressure brings calm weather
2. A. When air moves from areas of high pressure to areas of low pressure