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High silica is sticky and highly viscous, acting to impede the movement and escape of gases.
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Why is silica rich magma associated with explosive eruptions?
silica rich magma associated with explosive eruptions because it tends to trap water and gas bubbles :)
Why do magma and silca rich magma erupt explosively?
silica is a rich compound consisting of silicon and oxygen and tends to be thicker and is more resistant to flow. other lava with less silica flows easily so the amount of water vapor and other gases trapped in lava influences how lava erupts.
Why are magmas with high silica content dangerous?
High-silica magmas are extremely viscous, and so tend to trap a large amount of gas under pressure. When such magma erupts, it does so explosively.
What is the silica content of magma?
Mt. Etna is a stratovolcano like Krakatoa and Mt. Vesuvius, therefore it has a high silica content. Though lava with a high silica content does not tend to travel very far away from the source; it can be a double edged sword as magma with a high silica content tends to trap gasses until it reaches a bursting point, ending in a massive eruption.
What do greenhouses gases trap?
Greenhouse gases trap infrared heat (from the sun) rising from the surface of the earth. More greenhouse gases trap more heat, and this is the situation now. Increasing levels of carbon dioxide (CO2) in particular are trapping more heat and causing a global warming.
Why is silica rich magma associated with explosive eruptions?
silica rich magma associated with explosive eruptions because it tends to trap water and gas bubbles :)
Why do magma and silca rich magma erupt explosively?
silica is a rich compound consisting of silicon and oxygen and tends to be thicker and is more resistant to flow. other lava with less silica flows easily so the amount of water vapor and other gases trapped in lava influences how lava erupts.
Why are magmas with high silica content dangerous?
High-silica magmas are extremely viscous, and so tend to trap a large amount of gas under pressure. When such magma erupts, it does so explosively.
What is the silica content of magma?
Mt. Etna is a stratovolcano like Krakatoa and Mt. Vesuvius, therefore it has a high silica content. Though lava with a high silica content does not tend to travel very far away from the source; it can be a double edged sword as magma with a high silica content tends to trap gasses until it reaches a bursting point, ending in a massive eruption.
Why silica rich magma is more dangerous than iron rich magma?
The silica-rich magma, also called felsic magma, is more viscous than iron-rich or mafic magma. This means resists flow more (just as syrup is more viscous than water). The high viscosity means that the felsic magma can trap more gasses, leading to explosive eruptions, rather than effusive ones.
What is the name given to gases that trap heat and cause global warming?
The name given to gases that trap heat and cause global warming is Greenhouse gases.
What name is given to gases which trap heat from the sun?
They are generally called Greenhouses gases, as greenhouses trap heat into the glass.
What do greenhouses gases trap?
Greenhouse gases trap infrared heat (from the sun) rising from the surface of the earth. More greenhouse gases trap more heat, and this is the situation now. Increasing levels of carbon dioxide (CO2) in particular are trapping more heat and causing a global warming.
Where the greenhouse gases trap energy?
In the atmosphere
Do greenhouse gases trap heat near the earth's surface?
Yes, greenhouse gases trap heat in the troposphere, which is the lowest layer of the earth's atmosphere.
Is the sun involved in the greenhouse gases?
Yes. The greenhouse gases trap the sun's heat.
What are the functions and actions of greenhouse gases?
To trap heat. The functions of greenhouse gases are to absorb heat from sunlight and trap it in the atmosphere to warm the Earth and melt the ice caps.
