The cold air moves under the warm air because the former is denser. So Warm air is denser.
This is because as something grows colder, it becomes denser. Denser=more mass
A cold front forms when a colder air mass moves towards a warmer air mass. As the denser cold air displaces the warmer air, it force the warm air to rise rapidly and generates thunderstorms and severe weather along the front.
The type of air mass characterized by sinking cold air is known as a "polar air mass." These air masses typically form over cold regions, such as polar areas or ice-covered surfaces, and are denser than warmer air. When they sink, they can lead to high-pressure systems, resulting in clear skies and stable weather conditions.
A warm front forms when a warm air mass advances over a cold air mass, leading to the warm air gradually replacing the cold air. This process often results in steady, prolonged precipitation as the warm air rises over the denser, cooler air.
If the flowing air is warm it heat the air mass and cause this air mass to raise, and if it is cool it makes the air mass cold so it become denser then it descend.michael D.K
When a warm air mass moves into a region occupied by a cold air mass, a warm front forms. In this scenario, the warm air gradually rises over the denser cold air, leading to the development of clouds and precipitation. Warm fronts typically bring steady, prolonged rain, and the temperature usually increases after the front passes.
The point where these two air masses meet is called a front.If cold air advances and pushes away the warm air, it forms a cold front.When warm air advances, it rides up over the denser, cold air mass to form a warm front.If neither air mass advances, it forms a stationary front.
A hot air balloon behaves like an air mass in a high pressure area when it is descending. As the balloon descends, it enters a region of higher atmospheric pressure where the surrounding air is denser. This denser air can cause the hot air balloon to slow down and even sink if it cannot maintain its buoyancy.
A warm air mass that moves over a colder, denser air mass is typically referred to as a warm front. As the warm air rises over the cold air, it cools and can lead to cloud formation and precipitation. This process can result in prolonged periods of rain or storms, depending on the moisture content of the warm air. Warm fronts are often associated with a gradual increase in temperature and a shift in wind direction.
When two air masses collide, the denser air mass tends to slide under the less dense air mass, causing the less dense air to rise. This rising motion is influenced by differences in temperature, humidity, and pressure between the two air masses, leading to the formation of various weather phenomena like clouds, rain, and thunderstorms.
Cold air is denser than warm air, meaning it has a higher mass per unit volume. This higher density results in cold air having higher pressure compared to warm air.
tropical air mass