The mechanism to which the lava which the magma of depths of the earth separates from main cave, and flows goes and comes back was modeled. It is the system which can move from both of upper and lower sides of the lava flow model installed in stairs.
A crater calls the hole which spouts only the gas of a crater a gas emission mouth. And as for the diameter of several m, it is called a crater even if it is only gas. Here, the eruption tried to change with quantity spouted from a crater. The model of a crater is a system which assembles to two steps of the upper and lower sides, and is made to rotate a ventilation fan.
Lava flow is layer of fluid lava which is on surface of lava tube. Usually, fluid lava is left behind when flow of lava in a cave becomes loose. Fluid lava may be able to accumulate and do remelt or the jump shuttlecock of lava. This is also a general term showing the flow of lava.
A dormant volcano is a volcano where there is no present activity and record remains in man's history. As a dormant volcano, there are Mt. Fuji in Japan, Mt.halla of jeju volcanic island, etc. A dead volcano is a volcano where activity record does not remain in man's history. A dead volcano is a volcano which cannot work in the future, either.
Active volcano is volcano which is working now. It is volcano which there are always gas emission activities or erupts frequently. For example, the examples in Japan are Mt. Aso, Sakurajima, Asama-yama, etc., are also Kamchatka in Russia and are seen also Kilauea in Hawaii. It referred to them and the model was manufactured.
Lateral cone crater is a long depressed ground like the slot between a wall and tongue-like lava. The bottom has being also lower than an average floor and a high thing. The material of the installed model is spherical firing styrene, the Raqqah-spray, and the ventilation fan and red lamp of a PC peripheral.