Question

Which of the following statements accurately describes volcanic eruptions?

1. Volcanic eruptions involve the expulsion of molten rock and gases from a volcanic vent.
2. Only solid materials are ejected during a volcanic eruption, not gases.
3. The primary substance expelled during an eruption is magma after it reaches the Earth's surface.

• A. 1, 3
• B. 3 മാത്രം
• C. 1
• D. ഇവയൊന്നുമല്ല

Answer 1

Answer:

A. 1, 3

• Volcanic eruptions are a natural geological phenomenon where molten rock, known as magma beneath the surface and lava once it erupts, along with various gases, ash, and rock fragments, are expelled from beneath the Earth's crust through a vent. These vents are typically found in areas where tectonic plates converge or diverge, allowing magma to rise. The process can be gentle or extremely violent, depending on the viscosity of the magma and the gas content.