PBL Reflection

PBL Reflection

1	Introduction
2	How do volcanoes form?
3	Volcanic rock information
4	Volcano acrostic poem
5	Glossary
6	Positive and Negative
7	What is the impact do volcanoes have in the world we live in?

This is my volcano. What I found challenging was trying to make the shape. And getting all of the stuff together was pretty hard as well. It was pretty hard trying to get all of the stuff together.

What I had to do to make the shape is... get a jam jar and paper towel roll. To make the pumice I used a normal rock and just painted it white  `

Introduction  

What are the layers inside of the earth and how many?

There are 4 layers inside the earth they are the Earth's crust, Mantle, Outer Core and Inner Core. This will help us to understand how volcanoes are formed.  

         

How do volcanoes form?

Volcanoes are formed when  the tectonic plates split apart that is what causes a volcanic eruption. Within the Earth's upper mantle magma works its way to the surface. It erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.

               Volcanic Rock Infomation

Obsidian is an rock that looks like glass and it is an igneous rock that forms when molten rock cools very quickly. The result is a rock that cooled so fast, crystals did not get a chance to form.

Scoria is an igneous rock that is dark-colored with plenty of bubble-like cavities called cavity .Scoria's color can range from black or dark gray to a deep reddish brown. It has a distribution similar to that of basalt, or can also have a composition similar to andesite.

Andesite is an igneous volcanic rock intermediate in Mixture between rhyolite and basalt. Andesite lava. The word andesite is derived from the Andesite Mountains in South America, where andesite is common.

Basalt forms when lava reaches the Earth's surface at a volcano or mid ocean ridge. The lava is between 1100 to 1250° C when it gets to the surface. It cools quickly, within a few days or a couple of weeks, forming solid rock. Very thick lava flows may take many years to become completely solid.