Why do volcanoes form differently?

Why do volcanoes form differently?

When magma erupts at the surface as lava, it can form different types of volcano depending on: the viscosity, or stickiness, of the magma. the amount of gas in the magma. the composition of the magma.

Why do volcanoes form in some places and not others?

Volcanic eruptions occur only in certain places and do not occur randomly. This is because the Earth’s crust is broken into a series of slabs known as tectonic plates. As the plates move, they spread apart, collide, or slide past each other.

Can volcanoes be formed in different ways?

Volcanoes may also erupt in areas called hot spots where the crust is thin. Volcanoes erupt in different ways, producing different landforms. Steep, cone-shaped volcanoes form when plates collide. All the pressure and heat of the collision make for a violent eruption.

What is the relationship between the formation of volcanoes and the tectonic plates?

On land, volcanoes form when one tectonic plate moves under another. Usually a thin, heavy oceanic plate subducts, or moves under, a thicker continental plate. When this happens, the ocean plate sinks into the mantle.

Do all volcanoes look the same What is common in all volcanoes?

No, the same volcano can produce different magmas at different times and sometimes even in the same eruption. It depends on what has melted to form the magma in the magma chamber and what this magma has mixed with on its way to the surface.

Why don t earthquakes and volcanoes line up exactly on the plate boundaries?

At diverging plate boundaries, earthquakes occur as the plates pull away from each other. Volcanoes also form as magma rises upward from the underlying mantle along the gap between the two plates. We almost never see these volcanoes, because most of them are located on the sea floor.

Why and how do volcanoes erupt?

Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth’s mantle melts. Another way an eruption happens is when water underneath the surface interacts with hot magma and creates steam, this can build up enough pressure to cause an explosion.

Why don t earthquakes volcanic eruptions and mountain ranges occur randomly on Earth?

Volcanoes and earthquakes are not randomly distributed around the globe. Instead they tend to occur along limited zones or belts. As the plates move, their boundaries collide, spread apart or slide past one another, resulting in geological processes such as earthquakes, volcanoes and mountain making.

How are earthquakes and volcanoes similar and different?

Volcanoes form at Earth’s surface whereas earthquakes originate from deeper within the crust. Volcanoes are also features of planetary surfaces whereas earthquakes are just events though they are associated with certain features such as faults. Volcanoes are formed by release of gas and magma.

Why are all volcanoes not the same?

Why don’t all volcanoes look and act the same? Different types of magma cause different types of eruptions and create different sorts of volcanoes. Magma contains molten or partly molten rock and dissolved gases such as water. As soon as the pressure is released the gas can expand.

Can any mountain become a volcano?

Can mountains become volcanoes? Yes if magma seeps into a mountain it could explode making it a volcano.

Why are volcanoes not found at plate boundaries?

Unlike volcanoes associated with plate boundaries, hotspot, or inter-plate, volcanoes are located within tectonic plates. They are fueled by localized sources of high heat energy known as thermal plumes. These plumes of molten rock, called magma, rise from the lower asthenosphere.