Let's reproduce a volcanic form

What we will learn

This is an experiment which shows the changes in the viscosity of the magma of a volcanic form.
There are four stages: hard, middle, soft and very soft.

Preparations
		・Styrene foam ・wrap ・Stand (a camera tripod) ・Plastic bag ・Flour ・Soybean flour ・Cutter knife
Procedure
		First, a hole about 3cm in diameter is made in the center of styrene foam.
		Cover the styrene foam with wrap so that it is fixed. The place which has the hole in styrene foam should also have a hole in the wrapping.
		Put the styrene foam on the tripod.
		Next, we make the false magma.Flour and water are put in and mixed in the plastic bag. (It is changing the rate of water to a fixed quantity of flour, and the strength of stickiness was changed this time)
		The plastic bag containing flour and water is fixed to the hole of styrene foam (good to use a Scotch tape etc. ).
		A plastic bag is lightly pushed from the bottom and it is made for false magma to come out for a while like the left picture.
		Soybean flour is carried and it hardens with a finger lightly. This soybean flour become instead of the ground on magma.
		It is observed what kind of motion from the bottom, false magma is pushed out slowly and false magma spreads out.
Result



Conclusion
The stickiness of false magma -- becoming so even that it being soft -- geographical feature of the form which seldom spreads highly was made, so that it was hard. This shows that the form of a volcanic mountain changes with stickiness of magma.