The wind blowing a sand dune is an example of

The wind blowing a sand dune is an example of the Earth's atmosphere interacting with its geosphere. This can also be an example of wind erosion! the wind is moving the sand dunes from on position or area to another.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.