Table of Contents
What Is The Major Ingredient Of Magma??
silica content. The major ingredient in magma is silica (50- 70%) a compound made up of particles of the elements oxygen and silicon. The amount of silica in magma helps to determine its viscosity. The more silica magma contains the higher its viscosity.
What is the major ingredient of magma quizlet?
Magma is a complex mixture but its major ingredient is silica. The compound silica is made up of particles of the elements oxygen and silicon.
What are the two main factors that determine the viscosity of magma?
The viscosity of magma depends upon its silica content and temperature.
What provides the force that causes magma to erupt to the surface?
| Question | Answer |
|---|---|
| What provides the force that causes magma to erupt to the surface? | dissolved gases trapped in the magma |
| When magma hardens in a volcano’s pipe the result will eventually be a landform called a | volcanic neck |
| Magma that forces across rock layer hardens into a | dike |
Which characteristics of magma mainly determines its explosiveness?
Viscosity together with the amount of gas dissolved in magma can determine the explosivity of the eruption. More viscous magma with volatiles is more explosive than less viscous magma where gases can bubble out relatively easily.
What is magma composition?
Like solid rock magma is a mixture of minerals. It also contains small amounts of dissolved gases such as water vapor carbon dioxide and sulfur. The high temperatures and pressure under Earth’s crust keep magma in its fluid state.
How magma is formed?
Magma forms from partial melting of mantle rocks. As the rocks move upward (or have water added to them) they start to melt a little bit. … Eventually the pressure from these bubbles is stronger than the surrounding solid rock and this surrounding rock fractures allowing the magma to get to the surface.
What are the three major factors controlling the viscosity of magma lava?
The three factors that influence the viscosity of a lava are temperature the dissolved gases it contains and its chemical composition.
Which type of magma will produce the most explosive volcanic eruption?
Explosive eruptions are favored by high gas content & high viscosity magmas (andesitic to rhyolitic magmas). The explosive bursting of bubbles fragments the magma into clots of liquid that cool as they fall through the air. These solid particles become pyroclasts or volcanic ash.
What will happen when magma chambers are produced?
What provides the force that causes magma to erupt to the surface quizlet?
Pipe. What provides the force that causes magma to erupt to the surface? Dissolved gases trapped in the magma.
Why is silica content of a magma important?
The silica content of the magma determines how thick the magma is how easily it flows and how easily dissolved gases within the magma can escape therefore the silica content determines the characteristic of the volcanic eruption and the shape and size of the resulting volcanic cone.
Which of the following materials from a volcano determines its explosiveness?
The amount of dissolved gas in the magma provides the driving force for explosive eruptions. The viscosity of the magma however is also an important factor in determining whether an eruption will be explosive or nonexplosive.
What type of volcanic eruption is the most explosive?
What are the 3 main components of magma?
What are the top 2 compositions of magma?
The composition of the gases in magma are: Mostly H2O (water vapor) & some CO2 (carbon dioxide) Minor amounts of Sulfur Chlorine and Fluorine gases.
What is the top two composition of magma?
What is the lithosphere made of?
What are the four main factors involved in the formation of magma?
The main factors involved in the formation of magma are temperature pressure water content and mineral composition.
The composition of magma depends on the rock it was formed from (by melting) and the conditions of that melting. … All magmas have varying proportions of elements such as hydrogen carbon and sulphur which are converted into gases like water vapour carbon dioxide and hydrogen sulphide as the magma cools.
What is the viscosity of the lava?
With such a high silica content these lavas are extremely viscous ranging from 108 cP for hot rhyolite lava at 1 200 °C (2 190 °F) to 1011 cP for cool rhyolite lava at 800 °C (1 470 °F). For comparison water has a viscosity of about 1 cP.
What chemical and physical characteristics of magma are most important?
The chemical composition of the Magma determines whether the Magma will erupt explosively or mot. Explanation: There are a variety of gases that are present and very high pressure in the centre of the earth. Certain gases like oxides of nitrogen when present in high amount in the Magma makes it explosive.
What makes magma different from lava?
What are the factors that contribute to magma formation?
- Temperature plays a role in the formation of the melts in the magma. …
- Pressure can affect the shape and formation of melts.
Where and how is magma formed?
How does magma composition change during crystallization?
The means that the overall composition of the magma near the top of the magma chamber will become more felsic as it is losing some iron- and magnesium-rich components. This process is known as fractional crystallization.
What rocks are formed in a magma chamber?
Granite gabbro and diorite are examples of rocks that can form during the crystallization of a magma chamber.
What is magma that forces its way onto the surface of the earth and hardens?
| Question | Answer |
|---|---|
| Magma that forces its way into rocks and hardens is called… | Intrusion |
| A petrified fossil forms when… | Minerals replace all or part of an organism |
| The earliest forms of life appeared during the… | Precambrian Time |
| On the geologic time scale eras are divided into… | Periods |
Which type of magma has the highest viscosity?
Why does liquid magma flow upward through cracks in rock because?
Why does magma rise? Liquid magma flows upward because it is less dense than the surrounding solid material.
What is a silica content?
common on flanks of shield and stratovolcanoes. • Lava: first explosive eruption then quiet oozy lava. with small amounts of gas. • Viscosity: intermediate-high viscosity. • Silica Content: 63-68%
Which magma has the highest silica content?
As a result of its higher viscosity and gas content intermediate magma builds up pressure below the Earth’s surface before it can be released as lava. Felsic magma has the highest silica content of all magma types between 65-70%. Thick viscous felsic magma can trap gas bubbles in a volcano’s magma chamber.
What does magma with high silica content form?
Magmas with high silica content have a high viscosity (resistance to flow) and are generally more explosive when eruptions occur. All magmas also contain some degree of trapped gasses (CO2 & H2O ). The more trapped gas the more violent the explosion. All magma that reaches the surface can be classified as Lava.
Which of the following materials from a volcano?
Volcanic eruptions produce three types of materials: gas lava and fragmented debris called tephra.
