Collecting soil, sand and rocks.
Exposure of the material: is carried out on a suitable shelf at the center of the classroom dedicated to the sea. Here we show all the findings of research at Palo. Earth and sand are presented in numbered plastic glasses and dishes such as collection stations. The finer material is exposed in small boxes and collectibles in glass vials. A nice way to display the various types of sand and earth is to fill a vial or a piece of transparent plastic tube into sections, perhaps proportional to the sample material on the site, interspersed with sand or earth from a floppy cloth that keeps separate the materials and prevent mixing. The particular mineral are, of course, shown separately. To allow visitors to experience the presence of iron in the sand, we have prepared a shoe box full of sand and some magnets salvaged from broken radio speakers.