To explain clearly as there is a volcanic eruption, it is possible to manufacture its model of the house. This good occupation for children and their parents during vacation or a disease.
Books with the detailed description of that as as occurs at the time of eruption of the real volcano, are very interesting, and informative movies on this subject are surely necessary too. But the fact that in house conditions it is possible to manufacture the working model of a volcano attracts interest both of children, and of adults.
To make a volcano in house conditions, the glass jar of the big size, or a large bottle with rather wide throat is required to represent a crater. The narrow neck most likely will lead to the fact that the stream of a lava will beat up, having soiled everything around, for plausible running off on slopes of the mountain it is better for bank to use. Around this vessel it is necessary to build similarity of the mountain from improvised materials, it is desirable also that material maintained not one eruption, then it will be possible to show experiment not once, and subsequently to carry the model in school or to present to any circle.
It is possible to use for creation of a relief around a volcano plaster, the self-hardening plastic, polymer clay, plasticine, a papier-mache or salty dough. To create a plausible relief, the board on which the model will be located will be necessary. In the course of a molding it is necessary to represent ridges and canals on which the heated lava will flow, at the bottom steam of trees can arrange even for more harmonious picture.
The model has to dry out well, especially it concerns models from plaster and a papier-mache. The papier-mache after drying and a coloring will need to cover with several varnish coats that the first eruption did not wash away on it paint and did not force to get out of a shape. Paints for coloring it is possible to use any. Are not washed away by water and oil paint and acrylic do not demand an additional covering from above, but oil paints very long dry. For preparation of structure by means of which eruption will be arranged take a tablespoon of liquid soap or means for washing of ware and mix with a tablespoon of baking soda. There it is necessary to place red or orange food coloring that foam looked plausibly and reminded the heated lava. After mix is placed in a bottle or to bank, it is possible to begin eruption. For this purpose there with an average speed fill in a quarter of a glass of ordinary white vinegar. After addition of vinegar the neck of a volcano cannot be closed, the bottle or bank as a result can blow up. For use it is indoors better for mix proportion to reduce, they are given counting upon the crater made of a 3-liter jar. When eruption ends, the model of a volcano needs to be wiped from the marks left by soda and to remove before the following use.