The volcanic ash cloud created by a volcanic blast can change interactions between the atmosphere and sun, affecting climate patterns. When a volcano erupts, the main things that come out of it are sulfur dioxide, water vapor, dust and ash that go in the atmosphere. The eruption of a volcano can cause a cooling or…
A volcano is a vent in the earth from which molten rock and gas erupt. The molten rock that erupts from the volcano forms a hill or mountain around the vent. The lava may flow out as a viscous liquid or it may explode from the vent as solid or liquid particles. Kinds of Volcanic…
THE LITHOSPHERE The part of the earth that is made up of rocks and minerals, consists of the uppermost layers of the earth Came into being billions of years ago and still continues to change and evolve Changes to the worlds land masses, tectonic plates Volcanoes, earthquakes THE HYDROSPHERE The part of the earth made…
Definition: Continental Drift It is the theory that the earth’s continents are constantly in motion and at one time they all collided together to form one massive continent about 300 million years ago! Pangaea (meaning “all lands”) began to break up and drift apart. Founder of the Continental Drift Theory Alfred Wegener came up with…
Volcanoes formed at certian locations because they were along plate boundaries, which provide the ideal circumstances for magma formation and its subsequent eruption. At subduction boundaries the lithopsheres collide and the denser plate is pulled down into the mantle. This introduces water into the asthenosphere which lowers melting temperature and allows the less dense magma…