VOLCANOES
VOLCANOES A volcano is a vent in the earth’s crust from which molten rock material (magma), explosive bursts of gases, and volcanic ashes erupt. Forms of volcanoes Shield Volcanoes: Largest
TSUNAMI
TSUNAMI Tsunami means “harbor wave”. A tsunami, also called seismic sea waves, is one of the most powerful and destructive natural forces. It is a series of extremely long waves
SHIELDS
SHIELDS The term Shield refers to a very large, relatively stable, and relatively flat expanse of very old rocks. Shields constitute the earliest slabs of solidified molten crust. A shield
ROCKS
ROCKS The earth’s crust is composed of rocks. A rock is an aggregate of one or more minerals. Rocks may be hard or soft and in varied colors. For example:
ORIGIN AND EVOLUTION OF THE EARTH: THEORIES
ORIGIN AND EVOLUTION OF THE EARTH: THEORIES THE BIG BANG THEORY The Big Bang Theory is an astrophysical model of the universe that can be observed by human senses. The
LANDSLIDES
LANDSLIDES Landslides are simply defined as the mass movement of rock, debris, or earth down a slope and have come to include a broad range of motions whereby falling, sliding,
GLACIAL LAKE OUTBURSTS FLOOD
GLACIAL LAKE OUTBURSTS FLOOD A GLOF refers to the flooding that occurs when the water dammed by a glacier or a moraine (accumulations of dirt and rocks fallen onto the
GEYSERS AND HOT SPRINGS
GEYSERS AND HOT SPRINGS Mechanism: Intense heating: Water that percolated into the porous rock is subjected to intense heat by the underlying hard rock, which is in contact with hot
GEOMORPHIC PROCESS
GEOMORPHIC PROCESS The term geomorphic relates to the form of the landscape and other natural features of the earth’s surface. The forces causing physical and chemical changes on earth’s surface
EARTHQUAKE
EARTHQUAKE An earthquake is the shaking of the earth. It is a natural event. It is caused due to the release of energy, which generates waves that travel in all
EARTH INTERIOR
SOURCES OF INFORMATION ABOUT INTERIOR OF THE EARTH Earth’s radius is 6,370 km. It is rather difficult to make observations or collect samples of the material from inside of the