According to Met Office, fog forms when numerous small water droplets become suspended in the air. Fog happens most often in heavily polluted industrial areas where water can cling to the small pollution particles in the air.Know More
Met Office notes that the way fog forms depends on the type of fog. One of the most common types is radiation fog, which typically happens in winter during clear-sky conditions. When the thermal radiation in the atmosphere cools the air near the surface of the ground, air becomes less able to hold moisture and fog forms. Fog also forms on hills and valleys due to the different altitudes.
According to Wikipedia, fog is always low-lying due to the fact that its density is generally greater than that of the surrounding air. Fog is almost always formed close to bodies of water, ranging from small lakes and rivers to large oceans. As Met Office explains, evaporation fog is a common type of atmospheric phenomenon that occurs when cold air passes over warm water or very moist land, such as a marsh. The evaporation of the warm water into the lower layers of the air causes it to cool and produce a thick fog.Learn More
Humidity lowers air pressure by displacing nitrogen and oxygen molecules with lighter water molecules. Differences in humidity can cause storms to form. Humid air also presents challenges to pilots.Full Answer >
Air is made mostly out of nitrogen, oxygen and argon that are kept in proportion to each other. Interestingly, the gas that's most abundant in air isn't oxygen but nitrogen. Air is made up of about 78 percent nitrogen, and oxygen makes up about 21 percent of air.Full Answer >
The air humans breathe is made up of about 78 percent nitrogen, 21 percent oxygen, and 1 percent carbon dioxide and argon. Trace gases include krypton, methane, neon, helium and hydrogen. Air generally contains trace amounts of water vapor, as well, with greater concentrations occurring near sea level.Full Answer >
Air is made up of oxygen, nitrogen and carbon dioxide. It consists of approximately 78 percent nitrogen, 20 percent oxygen and trace amounts of carbon dioxide.Full Answer >