Why does air expand as it moves upward through the atmosphere quizlet?
why does air expand as it moves upward through the atmosphere? As air moves upward through the atmosphere the pressure gradually decreases due to gas and internal energy decreases, in which the air expands and cools adiabatically.
Why does a parcel of air expand as it moves upward?
A rising parcel of air expands because the air pressure falls with elevation. This expansion causes the air to cool. A falling parcel of air contracts because the air pressure increases. The contraction causes the air to warm.
What causes air to rise in the atmosphere?
The most powerful force which causes air to rise and cool is the Sun. When the Sun heats the surface of the Earth, warming of the air above the ground takes place. This warm air rises and cools as it goes higher. At a certain point, condensation will occur and clouds will form.
What happens to air as it rises into the atmosphere?
As air rises, air pressure at the surface is lowered. Rising air expands and cools (adiabatic cooling: that is, it cools due to change in volume as opposed to adding or taking away of heat). The result is condensation/precipitation. Cold air sinks.
What are four mechanisms that cause air to rise?
Lifting mechanisms are forms of lift that cause air to rise. In this topic we cover orographic lift, frontal lift, convergence, and convective lift.
What happens to the temperature of an air mass as it rises and why?
What happens to the temperature of the air mass as it rises and why? Temperature decreases because fewer air molecules allow the air mass to expand.
What happens to air as it rises in the atmosphere quizlet?
As air rises, it expands because air pressure decreases with an increase in altitude.
How is air displaced or forced upwards into the atmosphere?
There are three main ways by which uplift of air can occur: convection, front and orographic (mountain) uplift. In each case, the rising air is forced to cool by expansion, releasing condensation first as cloud, and if uplift and cooling continues, as rain, hail or snow.
What causes air to move?
As you might have guessed, since we've been discussing atmospheric pressure, the reason that air moves horizontally is related to pressure. Specifically, differences in pressure across the globe result in a force, called the "pressure gradient force" that sets air in motion.
What happens to air as it rises in the troposphere?
Air is warmest at the bottom of the troposphere near ground level. Air gets colder as one rises through the troposphere. That's why the peaks of tall mountains can be snow-covered even in the summertime. Air pressure and the density of the air also decrease with altitude.
What happens to air as it rises in the troposphere quizlet?
How does atmospheric pressure change within the troposphere? It decreases with increasing altitude.
What are three mechanisms that cause air to rise?
There are three main ways by which uplift of air can occur: convection, front and orographic (mountain) uplift. In each case, the rising air is forced to cool by expansion, releasing condensation first as cloud, and if uplift and cooling continues, as rain, hail or snow.
Why do air move upward and downward in the Earth system?
Local daytime heating of the ground causes surface air to become much warmer than the air above, and, because warmer air is less dense, it rises and is replaced by descending cooler air.
Why air masses moving on the surface of the Earth move in the way direction they move?
Warm air masses tend to move toward the poles. The Coriolis effect causes them to move on a diagonal. Many air masses move toward the northeast over the U.S. This is the same direction that global wind blow.
What are 4 ways that air can be forced upward?
These ways include:
- (A) When air becomes warmer than immediately surrounding air, it becomes less dense and rises.
- (B) When winds "collide" or converge near earth's surface, air is forced upward. This can happen, for example:
- (C) When winds encounter mountains, the mountains force the air upward.
Why does air flow from high to low pressure?
The Short Answer: Gases move from high-pressure areas to low-pressure areas. And the bigger the difference between the pressures, the faster the air will move from the high to the low pressure. That rush of air is the wind we experience.
How do air masses move in the atmosphere?
The air of cold air masses is more dense than warmer air masses. Therefore, as these cold air masses move, the dense air undercuts the warmer air masses forcing the warm air up and over the colder air causing it to rise into the atmosphere.
What causes air to rise at the equator?
The sun heats the equator more than it does the poles, so there is a perennial movement of air between these two regions. Hot air at the equator rises into the troposphere at the equator, creating a low pressure area underneath it that is filled by cooler air from higher latitudes.
Why does air move faster over the top of the wing?
A wing is shaped and tilted so the air moving over it moves faster than the air moving under it. As air speeds up, its pressure goes down. So the faster-moving air above exerts less pressure on the wing than the slower-moving air below. The result is an upward push on the wing—lift!
What made the air move in that direction?
Movement of air caused by temperature or pressure differences is wind. Where there are differences of pressure between two places, a pressure gradient exists, across which air moves: from the high pressure region to the low pressure region.
What happens when an air mass moves?
As air masses move, pushed by winds, they directly influence the weather in the regions over which they pass. In this way, they help to circulate heat and humidity in the atmosphere.
What does air moving toward the equator do?
Air moving toward the equator is deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, resulting in a persistent surface wind from the northeast on the north side of the Equator and from the southeast on the south side of the Equator.
How does the air in the equator move?
This Coriolis Effect causes the air that has risen at the equator and moving to the poles to deflect and become increasingly westerly high up in the atmosphere that the circulation breaks down and the air sinks back towards the ground in the sub tropics (30° – the 'horse latitudes').
Why does air go from high to low pressure?
Air pressure is higher because it is pushing DOWN on the ground. When air sinks from high in the atmosphere to the lower levels it warms up and dries out. This is because air at the top of the atmosphere is less dense. If we take that air lower to where the density is greater, it gets compressed.
What is Bernoulli’s principle in flight?
A: Bernoulli's Principle is the single principle that helps explain how heavier-than-air objects can fly. Bernoulli's Principle states that faster moving air has low air pressure and slower moving air has high air pressure.
When air rushes out of a balloon and it moves upward?
When we let go of the end, the air rushes out and pushes against the air around the balloon to move it in the opposite direction. Newton describes this effect in his Third Law of Motion: for every action, there is always an equal and opposite reaction.
What’s the movement of air called?
Wind is the movement of air, caused by the uneven heating of the Earth by the sun and the Earth's own rotation.
What is air mass movement?
The Movement of Air Masses transporting warm air northward and colder air southward. Counterclockwise winds associated with cyclones transport heat and moisture from lower to higher latitudes and play a significant role in the movement of air masses.
Why does air tend to rise in equatorial regions?
Why does air tend to rise in equatorial regions? Equatorial regions receive more direct sunlight than other areas. What is the air that sinks at latitudes of 30 degrees north and south like? The air is cool and dry.
What causes wind in the atmosphere and how does wind move?
Wind is moving air and is caused by differences in air pressure within our atmosphere. Air under high pressure moves toward areas of low pressure. The greater the difference in pressure, the faster the air flows.