What is silica in volcanoes? What is a composite volcano? What countries have the most volcanoes? What type of volcanoes are the Aleutian Islands? What kind of volcanoes are there in the Alpine Fault? Which volcanoes are located along diverging plate boundaries?
What is silica in volcanoes? What are steep sided volcanoes made from? Which magma composition will produce the most explosive volcanoes? Explore our homework questions and answers library Search Browse Browse by subject Ask a Homework Question ...
Natural glasses: Obsidian is a natural glass formed during an eruption of silica-rich magma. Shown here are Apache tears, mahogany obsidian, and snowflake obsidian. Minerals Amazonite (a green variety of microcline feldspar) Beryl (the mineral of aquamarine, emerald, and heliodor) Chrysocolla (a...
Common opal is a mineraloid. It is an amorphous silica with a chemical composition of SiO2.nH2O. It has a conchoidal fracture that is characteristic of an amorphous glass. Precious Opal is a mineraloid. The play-of-color in opal is produced when light travels through a three-dimensional ...
What are three types of volcanoes? Answer and Explanation: The three types of volcanoes are: Composite cone volcanoes: These types of volcanoes are conical in shape and contain layers of debris from lava, ash... Learn more about this topic: ...
Glass is chemically inert. This picture shows the silica atom in white, which binds with the four oxygen atoms. Each oxygen atom binds with one silica atom. Glass does not make chemical bonds because it is so solid, and all the bonds are taken. You must almost force a bond with anything...
There are many bridges (chemical connections) between silica oxygen anions (SiO2), which is why it is so difficult to relocate this magma. If the water has many electrons (cations), it is less viscous, because the frame system of silica is broken by these cations. How Obsidian is Formed?
Volcanoes form when magma, which consists of the partially molten solids beneath a planet’s surface, erupts. On Earth, that magma is mostly molten rock, composed largely of silica. But not every planetary body is made of rock — some can be primarily icy or even metallic. ...
obsidian, igneous rock occurring as anatural glass formed by the rapid cooling of viscous lava from volcanoes. Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite. Obsidian has a glassy lustre and is slightly har...
Free Essay: Banded Iron Formation 1. Describe Earth’s early atmosphere. The atmosphere was carbon dioxide with barle an oxygen. But as the Earth became...