What Is Atmospheric Pressure?
Cartoon character Norbert floats outside of a spacecraft with his dog

The information in this video was accurate as of the original publication date.

Audience: Educators and Students
Grades: K-8
Year: 2002

This NASA video segment explores atmospheric pressure and why humans must wear specialized suits in space. Viewers learn that atmospheric pressure is the force exerted by air molecules. One reason that astronauts must wear space suits is to maintain a normal air pressure on their bodies, because space is a vacuum.

What Is Atmospheric Pressure?
Duration: 46 seconds
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This video clip is part of the NASA CONNECT™: Functions and Statistics: Dressed for Space DVD that may be ordered from the Central Operation of Resources for Educators, or CORE  →.

Other video learning clips in this series:
The Construction and Design Elements of Spacesuit Technology
The Importance of Spacesuit Fitting and Sizing: One Size Does Not Fit All
Hands-on Activity in Spacesuit Design