# What Is The Cause Of Atmospheric Pressure?

## How strong is atmospheric pressure?

At sea level, the weight of the air above this unit area would (on average) weigh 14.7 pounds.

That means pressure applied by this air on the unit area would be 14.7 pounds per square inch.

Meteorologists use a metric unit for pressure called a millibar and the average pressure at sea level is 1013.25 millibars..

## Does high atmospheric pressure cause headaches?

Causes. Headaches can occur when pressure changes affect the small, confined, air-filled systems in the body, such as those in the ears or the sinuses. Changes in atmospheric pressure can create an imbalance in the pressure within the sinus cavities and the structures and chambers of the inner ear, resulting in pain.

## What is the cause of atmospheric pressure quizlet?

Atmospheric pressure is caused by the weight of air, just as water pressure is caused by the weight of water. … That the product of pressure and volume for a given mass of gas is a constant as long as the temperature does not change.

## What causes atmospheric pressure for kids?

Air is heaviest at sea level because the air molecules are compressed by the weight of the air above them. Air becomes lighter farther away from Earth’s surface as the air molecules become separated by more space. As the weight of the air decreases, so does the air pressure.

## What is the standard atmospheric pressure?

Standard atmospheric pressure is usually taken to be 0.760 m Hg at 0°C. This is a pressure of 101 325 Pa.

## What is the difference between atmospheric pressure and air pressure?

A: Air pressure is what you measure with a tire gauge. Atmospheric pressure is what you measure with a mercury barometer. … Pressure is the amount of force per unit area that a gas exerts on a surface.

## How does atmospheric pressure affect the body?

Barometric pressure is the weight of the atmosphere that surrounds us. Barometric pressure often drops before bad weather. Lower air pressure pushes less against the body, allowing tissues to expand. Expanded tissues can put pressure on joints and cause pain.

## What is the meaning of 1 atmospheric pressure?

One atmosphere (101.325 kPa or 14.7 psi) is also the pressure caused by the weight of a column of fresh water of approximately 10.3 m (33.8 ft). Thus, a diver 10.3 m underwater experiences a pressure of about 2 atmospheres (1 atm of air plus 1 atm of water).

## What is meant by atmospheric pressure What is the cause of atmospheric pressure?

atmospheric pressure. [ ăt′mə-sfîr′ĭk ] The pressure at any location on the Earth, caused by the weight of the column of air above it. At sea level, atmospheric pressure has an average value of one atmosphere and gradually decreases as altitude increases. Also called barometric pressure.

## Can we feel atmospheric pressure?

The reason we can’t feel it is that the air within our bodies (in our lungs and stomachs, for example) is exerting the same pressure outwards, so there’s no pressure difference and no need for us to exert any effort.

## What is atmospheric pressure in simple words?

That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer. … Meteorologists describe the atmospheric pressure by how high the mercury rises.

## What is the value of atmospheric pressure?

2.1 MEASURING ATMOSPHERIC PRESSURE The mean value of h measured at sea level is 76.0 cm, and the corresponding atmospheric pressure is 1.013×105 kg m-1 s-2 in SI units.

## What if there was no atmospheric pressure?

All unprotected plant and animal life on the Earth’s surface would die. We can’t survive long in a vacuum, which is what we’d have if the atmosphere suddenly vanished. It would be much like being “spaced’ or shot out of an airlock, except the initial temperature would be higher. Eardrums would pop.