when hot and cold air meet, the hot air rises to the top. which process causes the hot air to rise?

Why does air rise and fall?

Hot air rises because gases expand as they heat up. When air heats up and expands, its density also decreases. The warmer, less dense air effectively floats on top of the colder, denser air below it. This creates a buoyant force that causes the warmer air to rise.

What is convection by Brainly?

Brainly User. When a fluid, such as air or a liquid, is heated and then travels away from the source, it carries the thermal energy along. This type of heat transfer is called convection. The fluid above a hot surface expands, becomes less dense, and rises. kaypeeoh72z and 8 more users found this answer helpful.

What happens to rising air?

The air parcel expands as it rises and this expansion, or work, causes the temperature of the air parcel to decrease. As the parcel rises, its humidity increases until it reaches 100%. When this occurs, cloud droplets begin forming as the excess water vapor condenses on the largest aerosol particles.

When warm air rises and cools what happens quizlet?

The moving warm air rises over the cooler dense air as the two air masses collide. The rising warm air-cools adiabatically and the cooling generates cloud and precipitation.

What happens when two cold air masses meet?

When two air masses meet together, the boundary between the two is called a weather front. At a front, the two air masses have different densities, based on temperature, and do not easily mix. One air mass is lifted above the other, creating a low pressure zone. … Fronts are the main cause of stormy weather.

Why does warm air rise and cold air sink quizlet?

Warm air rises and cold air sinks because of the uneven heating on the earth. … Wind is formed by the uneven heating of the earth, causing the warm air to rise and the cold air to sink.

What is the result when cold air sinks?

The Lightness of Water Vapor Buffers Climate Warming in the Tropics. Conventional knowledge has it that warm air rises while cold air sinks. … This is called the vapor buoyancy effect. This study discovered this effect allows cold, humid air to rise, forming clouds and thunderstorms in Earth’s tropics.

Does heat rise or sink?

Heat does not rise or sink because it isn’t actually a substance, it’s energy being transferred. It is hot air which rises. The reason for this is that hotter air is more dilute than colder air. Or equivalently: colder air is denser than hotter air.

What is the convection process?

convection, process by which heat is transferred by movement of a heated fluid such as air or water. … Forced convection involves the transport of fluid by methods other than that resulting from variation of density with temperature. Movement of air by a fan or of water by a pump are examples of forced convection.

What process involves convection?

7.2 Convection

Convection involves the transfer of heat through gaseous or liquid fluids. It is the main method of heat transfer between a solid and a fluid in contact with it; for example, a bare die and the surrounding air.

How does convection heat occur?

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. … The denser cold liquid or gas falls into the warm areas.

How does conduction of heat occur?

Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them. This then continues and passes the energy from the hot end down to the colder end of the substance.

What is convection and conduction?