tehya volcanoes

Volcanoes

In room 5 we have been learning about volcanoes: why they erupt, How movement of plate techtonics form a volcano.

1. Why they erupt.

There are several factors that will trigger an eruption like: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.

2.Why do volcanoes become dormant.

Volcanoes become dormant because magma from the earths core can no longer reach the volcano


3. How can the movement of plate techtonics form a volcano.

A hill with a dent like a cupcake and has a cut in the earth where lave and ash come out of.



Now in room 5 we are making small volcanoes made of: card, a glass bottle, newspaper and paint.

We watched a video off the internet which is really easy to follow for all ages and its really fun to make.  The instructions were as follows:

First, take an A3 piece of paper and cut a small hole in the middle turn it into a cone like shape if its a bit crooked thats ok because you need to cut it anyway.

Second, tape the cone so that your glass bottle top can fit through to put your vineger and baking soda in the top.

Third, tape it to a another card so that nothing falls out of the bottom, now you are ready  for painting once the paint dries its ready for vineger and baking soda don't put that in yet were not sure how much yet but I'll be here next week to tell you how much and what happened bye.

By Tehya

Room 5