Final answer:
In weather, low-pressure systems cause moist air to rise and condense, leading to cloud formation and precipitation. Temperature and geographic factors also affect precipitation levels. High-pressure systems are associated with clear and dry weather.
Step-by-step explanation:
In terms of weather, low-pressure systems occur when the earth's surface atmospheric pressure is lower than the surrounding environment: Moist air rises and condenses, producing clouds. Movement of moisture and air within various weather fronts instigates most weather events.
Precipitation is also influenced by temperature. Warm air can hold more moisture than cold air, so tropical areas receive more rainfall than other parts of the world. Nearness to the ocean and mountain ranges may also influence the amount of precipitation an area receives.
There is a relationship between high- and low-pressure air systems and precipitation. In low-pressure systems, rising moist air condenses and forms clouds, leading to precipitation. High-pressure systems, on the other hand, are associated with clear and dry weather due to sinking air and lack of cloud formation.