The seeds and leaves of the fennel plant both have a licorice flavor, although the flavor of fennel is milder and somewhat sweeter than anise. Fennel seeds are actually a spice, although the leaves, stalks and roots of the plant are known as a herb.
Definition of air mass. : a body of air extending hundreds or thousands of miles horizontally and sometimes as high as the stratosphere and maintaining as it travels nearly uniform conditions of temperature and humidity at any given level.
A huge body of air that has similar temperature, humidity, and air. pressure at any given height is called an. air mass. Scientists classify air. masses according to temperature and humidity. Four major types of air. masses inï¬uence the weather in North America: maritime tropical, continental tropical, maritime polar, and continental polar. Tropical, or. warm, air masses form in the tropics and have low air pressure.