The Science Behind Volcanoes: Exploring Plate Tectonics and Eruptions

The video explains the origin of the term 'Volcano' and delves into the science of plate tectonics, describing the Earth's structure with its molten core, crust, and shifting stone plates. It details how cracks between plates allow gas and heat to escape, leading to the formation of volcanoes. The process of volcanic eruptions is explained as a result of temperature and pressure imbalances. The video also covers the properties of magma, highlighting its lower density compared to solid rock, causing it to rise and eventually lead to volcanic activity.

What is the origin of the word 'volcano'?

• It comes from the Greek God of fire.

• It is derived from the Roman God of fire, Vulcan.

• It is named after a famous mountain.

• It originates from a Latin word meaning 'fire'.

What is the Earth's crust primarily composed of?

• Gaseous layers

• Molten rock

• Liquid metal

• Solid ground

How do cracks and openings form in the Earth's crust?

• Due to the cooling of the Earth's core

• From the impact of meteorites

• As a result of overlapping tectonic plates

• Because of volcanic eruptions

Why does magma rise to the Earth's surface?

• It is lighter and expands when heated.

• It is pushed by ocean currents.

• It is denser than solid rock.

• It is pulled by gravitational forces.

What causes a volcanic eruption?

• The solidification of the Earth's core

• The pressure and temperature imbalance

• The movement of ocean tides

• The cooling of magma