Earthquakes !!!

Explain how earthquakes occur using keywords such as Tectonic plates, fault lines and tremors.

Challenge for you all is to find o ut some facts about earthquakes in Mexico which you can use in your documentaries on Thursday,

Watch the video to remind yourself of todays learning.

 

5 thoughts on “Earthquakes !!!

  1. When two tectonic plates beneath the earth’s crust collide ,there is sudden release of energy resulting in earthquake.The surface where the plates slip over another is called fault line.
    The earthquake is recorded with a instrument called seismograph.The intensity of the earthquake is measured by Richter scale.

  2. Earthquakes happen when the Tocionic plates colide.Mexico had more than 21 earthquakes.Earthquakes, also called temblors, can be so tremendously destructive, it’s hard to imagine they occur by the thousands every day around the world, usually in the form of small tremors.Loss of life can be avoided through emergency planning, education, and the construction of buildings that sway rather than break under the stress of an earthquake.Some 80 percent of all the planet’s earthquakes occur along the rim of the Pacific Ocean, called the “Ring of Fire” because of the preponderance of volcanic activity there as well. Most earthquakes occur at fault zones, where tectonic plates—giant rock slabs that make up the Earth’s upper layer—collide or slide against each other.Other quakes can occur far from faults zones when plates are stretched or squeezed.There are about 20 plates along the surface of the earth that move continuously and slowly past each other.The theory of plate tectonics is a interesting story of continents drifting from place to place breaking apart, colliding, and grinding against each other.
    what is a fault?
    A fault is an area of stress in the earth where broken rocks slide past each other, causing a crack in the Earth’s surface. There are the major types of faults: dip-slip normal, dip-slip reverse, strike-slip, and oblique-slip. Imagine holding a pencil horizontally. If you were to apply a force to both ends of the pencil by pushing down on them, you would see the pencil bend. After enough force was applied, the pencil would break in the middle, releasing the stress you have put on it. The Earth’s crust acts in the same way. As the plates move they put forces on themselves and each other. When the force is large enough, the crust is forced to break. When the break occurs, the stress is released as energy which moves through the Earth in the form of waves, which we feel and call an earthquake.

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