GEOLOGY

Detailed explanation-1: -If magma is thick and sticky, gases cannot escape easily. Pressure builds up until the gases escape violently and explode.

Detailed explanation-2: -As the magma rises, bubbles start to form from the gas dissolved in the magma. The gas bubbles exert tremendous pressure. This pressure helps to bring the magma to the surface and forces it in the air, sometimes to great heights. It’s sort of like the bubbles of gas in a bottle of soda.

Detailed explanation-3: -It’s the dissolved gases cause volcanoes to erupt. A magma chamber contains high pressure and dissolved gases. The density contrast between the magma and the surrounding rock causes more buoyant magma to rise. As the magma rises, the dissolved gases start to come out of the liquid and form bubbles.

Detailed explanation-4: -When enough magma builds up in the magma chamber, it forces its way up to the surface and erupts, often causing volcanic eruptions. In the ocean, volcanoes erupt along cracks that are opened in the ocean floor by the spreading of two plates called a mid-ocean ridge .

Detailed explanation-5: -How Do Volcanoes Erupt? It is so hot deep within the earth that some rocks slowly melt and turn into a thick flowing matter known as magma. Since it is lighter than solid rock, the magma rises and collects in magma chambers. Eventually, some magma pushes through fissures and vents on the earth’s surface.