Which one of the following situations would cause air pressure to rise?

Question

A)An increase in altitude.
B)An increase in temperature.
C)Cold air entering a region.
D)Moisture entering the air.

Answer 1

"B" Check your car tires in the summer if you don't believe me.........

Answer 2

an increase in altitude decreases pressure
That's why planes have pressurized cabins

an increase in temperature will increase pressure
air molecules are heated and jump around more thereby increasing forces and therefore pressure

cold air entering a region decreses pressure since the cold air causes a cooling down of the air molecules and a decrease in pressure follows

moisture entering the air will not impact pressure at all unlesss it is at a different temperature or pressure when it does so

Answer 3

See the information below ... but what it basically means is that the EARTH's observed air pressure rises WHEN COLD AIR ENTERS A REGION. This is because there are more air molecules over a given surface area ... thereby exerting more "pressure".

If you're talking about a closed system (like a balloon), then the relation between pressure, volume, and temperature takes effect. Holding the volume of the balloon constant, a rise in temperature causes a rise in pressure.

Air pressure is simply the weight of air above an object. The weight of air is directly related to the number of air molecules in a given volume. So, air pressure depends on the number of air molecules in a given volume above an object and how fast the molecules are moving.

From sea-level to the top of the atmosphere, the weight of all molecules above each square inch of any object (for example, a one inch by one inch piece of paper), is about 14.7 pounds.

That is a lot of weight considering it is just molecules. However, it is also a lot of molecules. Near sea-level, a box with a volume of one cubic inch (1 inch x 1 inch x 1 inch) contains around 400 sextillion air molecules (400 followed by 21 zeros).

As elevation increases, the number of molecules decreases and the weight of air therefore is less, meaning a decrease in air pressure. In fact, while the atmosphere extends more than 15 miles (24 km) up, one half of the air molecules in the atmosphere are contained within the first 18,000 feet (5.6 km).

Because of this decrease in pressure with height, it makes it very hard to compare the air pressure at one location to another, especially when the elevations of each site differ. Therefore, to give meaning to the pressure values observed at each station, we need to convert the station air pressures reading to a value with a common dominators. The common dominator we use is the sea-level. At observation stations around the world, through a series of calculations, the air pressure reading, regardless of the station elevation, is converted a value that would be observed if that instrument were located at sea level.

Although the changes are usually too slow to observe directly, air pressure is almost always changing. This change in pressure is caused by changes in air density, and air density is related to temperature. Warm air is less dense than cooler air because the gas molecules in warm air have a greater velocity and are farther apart than in cooler air. So, while the average altitude of the 500 millibar level is around 18,000 feet (5,600 m) the actual elevation will be higher in warm air than in cold air.

Answer 4

Trick question.

Given that all other factors stay the same (altitude, temp, volume of the container, etc) then B would increase air pressure. As the temperature of a gas increases, the kinetic energy of its molecules increases (they move around faster).

Answer 5

B. An increase in temperature.