Table of Contents
- 1 What two factors affect eruptions?
- 2 What are the 3 main effects of volcanic eruptions?
- 3 How does volcanic eruption affect the biotic factors?
- 4 What are the effects of a volcanic eruption on land?
- 5 How does viscosity affect volcanic eruptions?
- 6 What is the main factor that controls how explosive a volcanic eruption will be?
- 7 How do volcanoes happen?
- 8 What are the factors affecting the explosivity of magma?
What two factors affect eruptions?
The two main factors that influence how a volcano will erupt are viscosity and gas content.
What are the 3 main effects of volcanic eruptions?
Major health threats from a volcanic eruption Health concerns after a volcanic eruption include infectious disease, respiratory illness, burns, injuries from falls, and vehicle accidents related to the slippery, hazy conditions caused by ash.
How does the shape of the volcano affect the eruption?
Depending on how viscous the lava is will depend on the shape. If the volcano produces very sticky magma (high in silica) it tends to have an explosive eruptive style that includes lava, pyroclastic flows, and ash. This material piles up right around the volcano, forming a steep cone, a classic volcano shape.
What factors affect the explosiveness of an eruption?
A volcano’s explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it. As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions.
How does volcanic eruption affect the biotic factors?
Livestock and other mammals have been killed by lava flows, pyroclastic flows, tephra falls, atmospheric effects, gases, and tsunami. They can also die from famine, forest fires, and earthquakes caused by or related to eruptions. Eruptions can influence bird migration, roosting, flying ability, and feeding activity.
What are the effects of a volcanic eruption on land?
Volcanism can change the gas composition of the atmosphere, increase the temperature of the atmosphere, and cause a decrease in solar radiation reaching Earth’s surface. Climate cooling at Earth’s surface attributed to volcanic eruptions is primarily a result of the formation and spread of stratospheric H2SO4 aerosols.
What are the three factors that affect the shape of volcanic cone?
These include: The volume of volcanic products. The interval length between eruptions. The composition of volcanic products.
What are the three main shapes of a volcano?
There are three types of volcanoes: cinder cones (also called spatter cones), composite volcanoes (also called stratovolcanoes), and shield volcanoes. Figure 11.22 illustrates the size and shape differences amongst these volcanoes. Shield volcanoes, which get their name from their broad rounded shape, are the largest.
How does viscosity affect volcanic eruptions?
Viscosity is the ability of a liquid to resist flowing. This means liquids with a higher viscosity are thicker and do not flow as easily. Magmas with a higher SiO2 content have a higher viscosity. Ultimately, the viscosity of a magma will determine the shape a volcano takes over continued eruptions.
What is the main factor that controls how explosive a volcanic eruption will be?
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 are the 3 factors that affect the eruptive style of volcanoes?
What are the 3 primary factors affecting the volcanoes eruptive style? The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity (how runny the magma is), volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano. Click to see full answer.
What determines the end-member type of an eruption?
Whether or not an eruption falls into one of these end-member types depends on a variety of factors, which are ultimately linked to the composition of the magma(molten rock) underlying the volcano.
How do volcanoes happen?
Volcanoes happen when magma rises to the surface of the earth, which causes bubbles of gas to appear in it. This gas can cause pressure to build up in the mountain, and it eventually explodes. When the magma bursts out of the earth, it is called lava.
What are the factors affecting the explosivity of magma?
Magma composition is discussed below, followed by a description of the controlling factors on explosivity — viscosity, temperature, and the amount of dissolved gasesin the magma. MAGMA COMPOSITION AND ROCK TYPES