Project research 2 and a half

What is air pressure

What is air pressure? Air pressure is the weight of air molecules pressing down on the Earth. The pressure of the air molecules changes as you move upward from sea level into the atmosphere. The highest pressure is at sea level where the density of the air molecules is the greatest.

Measuring air pressure on island of Hawaii. Left picture taken at 14,000 ft at Mauna Kea observatory when the bottle was sealed. Middle picture of the sealed bottle at 9000 ft. Last picture taken at 1000 feet where the bottle was crushed.

WHAT IS AIR PRESSURE

Sea level air pressure

The greatest air pressure pressing down on our bodies is at sea level. Scientists use the term one atmosphere to describe the pressure at sea level. Normal pressure at sea level is 14.7 psi (pounds per square inch). Normal pressure at sea level measures 29.9213 inches (760 mm) on barometers. This means that on every square inch of our body and

At sea level on the surface of the Earth there is almost a ton of pressure pressing on every square inch of our body. The reason we are able to move our hands back and forth is because the pressure is equal on all parts of our hands. Our bodies are not crushed by the weight of the pressure because there is equal pressure inside and out of our bodies also.