#  The Atmosphere 

 



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### Golf Ball Atmosphere

\[L | t | ★★★\]  
Demonstration of molecular motion and pressure using golf balls.  
  
\[[In-Depth Description](/presentations/golf-ball-atmosphere)\]

### 55 Gallon Drum

\[L | t+ | ★★★\]  
Drum evacuated by vacuum pump; crushed by atmospheric pressure.   
  
\[[In-Depth Description](/presentations/55-gallon-drum)\]

### Convection Cell

\[S/M | t+ | ★★★\]  
A temperature gradient is applied to a two-dimensional cell filled with rheoscopic fluid; beautiful convection currents are observed.  
  
\[[In-Depth Description](/presentations/convection-cell)\]

### Cloud in a Bottle and Nucleation

\[M | t | —\]  
A 5-gallon bottle containing air and water vapor is slightly pressurized; a sudden release of the pressure cools the vapor, forming a cloud.

### Smog in a Bottle

\[M | t+ | ★★★\]  
Nitrogen dioxide is produced by an electric discharge in air and, when sprayed with a water mist, produces acid rain.  
  
\[[In-Depth Description](/presentations/smog-bottle)\]

### Greenhouse Bottles

\[S | t+ | ★★\]  
Simulation of the greenhouse effect with silvered and unsilvered glass bottles.  
  
\[[In-Depth Description](/presentations/greenhouse-bottles)\]

### Polarization by Scattering

\[M | t+ | ★★★\]  
Simulation of atmospheric scattering and polarization of sunlight using slide projector and aquarium containing milky water.  
  
\[[In-Depth Description](/presentations/polarization-scattering)\]

### 20% Oxygen

\[M | t++ | —\]  
Air is shown to be 20% oxygen by burning magnesium in a glass cylinder inverted over water.

### Giant Raindrop

\[M | t+ | —\]  
Large water-filled plastic raindrop shows, by laser ray tracing, the opticsof rainbow making.

### Van de Graaff Generator

\[L | t+ | —\]   
Anti-antique electrostatic generator to be used with pie plates, etc. or just as a demonstration by itself (of static electricity generation).

### Contact Us

**Mailing Address**: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138  
**Campus Location**: Science Center B-08A | **Tel**: (617) 495-5824 | **Email**: scidemos-at-fas.harvard.edu