What occurs when warm air is forced up and over a mass of cooler air?

What occurs when warm air is forced up and over a mass of cooler air?

In other words, the warmer air mass is forced to rise over the colder air mass. As air from the warm air mass rises, it cools, leading to the development of clouds and maybe precipitation. Large areas of clouds and precipitation are common near weather fronts.

How can condensation be triggered to form clouds or fog quizlet?

Sublimation. How can condensation be triggered to form clouds or fog? Cool the air to its dew point.

What occurs near Earth’s surface around an anticyclone?

is the result of horizontal differences in air pressure. of air occurs near Earth's surface around an anticyclone.

What happens to air as it is warmed quizlet?

What three things happen when air is warmed? it rises, becomes lighter, and expands.

Where does Convectional lifting occur?

Convective lifting is air lifting by convection. Convection occurs in all fluids, and is the process of warm particles rising and cool particles sinking. Convection is most likely to occur in 'hot spots' on Earth's surface because these areas get warmed more than others.

What is formed when warm air rise and cool air fall?

The warm air rises gradually over the cold air as they meet. As the warm air rises it cools and condenses to form clouds. Rain falls along the front as long periods of drizzle or steady rain.

When warm moist air moves over a cold surface blank fog may result?

Advection fog forms due to moist air moving over a colder surface, and the resulting cooling of the near-surface air to below its dew-point temperature. Advection fog occurs over both water (e.g., steam fog) and land.

What is condensation is condensation a warming or cooling process?

Is condensation a warming or cooling process? Condensation is when a gas becomes a liquid. It is a warming process.

What is cyclonic and anticyclonic?

Anticyclone. A cyclone is an area of low pressure where air masses meet and rise. An anticyclone is an area of high pressure where air moves apart and sinks. It indicates bad weather, like rain and clouds.

What happens during anticyclone?

Where the air pressure is high at the surface in an anticyclone, the air above it descends. As the air descends, the pressure rises (because there is more atmosphere above) and so the temperature of the descending air rises. In this case, evaporation usually exceeds condensation and so cloud droplets don't form.

What describes warm air over cool air?

Warm fronts occur when light, warm air meets cold air. The warm air rises gradually over the cold air as they meet. As the warm air rises it cools and condenses to form clouds. Rain falls along the front as long periods of drizzle or steady rain.

What happens to the mass of air when it is cooled?

So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.

What is Convectional uplift?

Convective uplift occurs when air near the ground is warmed by the sun and begins to rise. Air rises and cools, forming clouds and precipitation. Frontal uplift occurs when two different air masses interact.

What causes orographic lifting?

Orographic lift occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. As the air mass gains altitude it quickly cools down adiabatically, which can raise the relative humidity to 100% and create clouds and, under the right conditions, precipitation.

When warm air rises cold air will quizlet?

Warm air rises and cold air sinks because of the uneven heating on the earth. How is wind formed?

What is it called when warm air expands and rises?

Denser air exerts a higher pressure than less dense air. Denser air flows toward the less dense air just like the clay! This flow of air is called WIND! Air that moves horizontally is called wind. Air that rises is called an updraft.

What is convection fog?

Fogs also can occur when cold air moves over a warm, wet surface and becomes saturated by the evaporation of moisture from the underlying surface. Convection currents, however, tend to carry the fog upward as it forms, and it appears to rise as steam or smoke from the wet surface.

When warm moist air moves over a cold surface fog may result quizlet?

If fog droplets combine with such pollutants it becomes acid fog. See Acid rain. Occurs when warm, moist air moves over a cold surface and the air cools to below its dew point. You just studied 36 terms!

What is condensation process?

Condensation is the process of water vapor turning back into liquid water, with the best example being those big, fluffy clouds floating over your head. And when the water droplets in clouds combine, they become heavy enough to form raindrops to rain down onto your head.

What is condensation heating?

Definition of heat of condensation : heat evolved when a vapor changes to a liquid specifically : the quantity of heat that is evolved when unit mass of a vapor is changed at a specified temperature to a liquid and that equals the heat of vaporization.

What is a cyclonic wind?

cyclone, any large system of winds that circulates about a centre of low atmospheric pressure in a counterclockwise direction north of the Equator and in a clockwise direction to the south.

What is a cyclone and anticyclone?

A cyclone is an area of low pressure where air masses meet and rise. An anticyclone is an area of high pressure where air moves apart and sinks. It indicates bad weather, like rain and clouds.

What is an anticyclone?

anticyclone, any large wind system that rotates about a centre of high atmospheric pressure clockwise in the Northern Hemisphere and counterclockwise in the Southern. Its flow is the reverse of that of a cyclone (q.v.).

What happens when a warm air mass replaces a cold air mass?

A warm front is defined as the transition zone where a warm air mass is replacing a cold air mass. Warm fronts generally move from southwest to northeast and the air behind a warm front is warmer and more moist than the air ahead of it.

What happens to the warm air when it overtakes the cold air?

At a warm front, a fast-moving warm air mass overtakes a slowly moving cold air mass. Because cold air is denser than warm air, the warm air moves over the cold air. If the warm air is humid, light rain or snow falls along the front. If the warm air is dry, scattered clouds form.

What happens when warm air and cold air meet?

When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses. This type of front is called a warm front.

What happens to the mass of air as it warms up?

Hot Air. Air is made up of molecules that are constantly in motion. As air warms up, the molecules start to vibrate and bump into each other, increasing the space around each molecule. Because each molecule uses more space for motion, the air expands and becomes less dense (lighter).

Where does convergent lifting occur?

In the center of low pressure areas, winds converge toward the center of the low due to the effects of friction. Since the air cannot go down into the earth, it must rise up. This lift due to convergence leads to the presence of clouds and precipitation near low pressure centers.

What happens when warm air cools?

As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.

Why does warm air rise and cool air sink quizlet?

Terms in this set (15) Warm air rises because it's molecules are moving and are less dense, and cool air sinks because it's molecules are more subdued and denser.