Process of Volcanic Eruptions

Question 1

First step of Volcanic Eruption

Answer 1

Formation of Magma: Magma forms in the Earth’s Mantle, a layer beneath the Earth’s crust.

Question 2

Second Step of Volcanic Eruption

Answer 2

Pressure Builds Up: The magma in the mantle rises and collects together in a magma chamber beneath the volcano. The magma is under a lot of pressure and pushes against the Earths Crust. The magma wants to escape but the crust holds it in

Question 3

Third Step of Volcanic Eruption

Answer 3

Cracks and Fissures: Magma pushes through the fissures /vents, which are the weak spots or cracks in the Earth’s Crust. If the pressure is high enough, it will break through.

Question 4

Fourth Step of Volcanic Eruption

Answer 4

Eruption: When the pressure becomes too much, the volcano erupts, releasing not only lava but also gas and ash. It can be explosive or gentle depending on the volcano and the amount of pressure built up.

Question 5

Fifth Step of Volcanic Eruption

Answer 5

Lava Flows and Cools: The magma that came out is now lava, it flows on the sides of the volcano and cools down. Once cooled, it hardens and becomes new rock. Repeated eruptions add new layers of lava and ash, creating the shape of the volcano.

Question 6

Sixth Step of Volcanic Eruption

Answer 6

Post-Eruption: The Volcano may go through periods of dormancy or may erupt again if there’s still magma left. Erosion and weathering overtime can wear down the volcano.