Monday, February 8, 2010

natural, human, and greenhouse effect that change the Earth!




The matter that comprises all of Earth’s features is never lost. It is continuously being recycled.
The Earth’s crust is pushed up into mountains as a result of tectonic plate movement; at the same time, the mountains are being eroded by physical, chemical and atmospheric forces; such as tornadoes, floods, and human interactions. The eroded rubble is then recycled into new formations; like the Grand Canyon or landfills.
When the tectonic plates have movement they could have several effect on the Earths surface if they are separating you create an Earth quake where when to plates are separating and they have not fully tore apart and they still keep moving forcing them to separate making a force that makes the land move and we call an earth quake. If it moves into each other there's volcanic activity.
volcanic activity is when two plates hit each other and one goes under and becomes “molten” which means it gets extremely hot, the ground then turns into liquid. The molten finds a hole in the ground and comes out the top becoming lava. This leads me to another subject as to how the world was formed. All of the continents used to be just one big piece of land called Pangea (shown in the picture), but the land due to plate movement broke up and separated and created the seven continents we have now. This is what we call continental drift.
So far we have continental drift, volcanic activity and earth quacks as to how we have formed the land. Somethings are changed because of humans take for example landfills. landfills are full of trash which then gets covered by dirt and then refilled with more trash! creating basically mountains of trash. Another thing that humans have changed to the formation of earth is the advancements for humans like cars; they cause pollution which is a major factor of the green house effect. Green house effect is caused by an atmosphere containing gases that absorb and emit infrared radiation. Greenhouse gases trap heat within the surface-troposphere system, causing heating at the surface. when the surface becomes warmer and the atmosphere temperatures lower it causes a global warming. Ever since the mid 20th century global warming has been a major factor to the formation of earth. With the fear of Artica slowly disappearing (as shown in the video below) is the fear of the animals like polar bears and other habitual animals becoming extinct from drowning and lack of food. Artica is not the only place noticing the difference in the place due to global warming you can also see it in places like green land and Iceland in the mountains that once had miles of snow all are slowly decreasing.
what can we do to help the land allowing only natural changes to occur to the land so that it wont harm the earth! we live here so we need to preserve it. we need not one day a year to help the land but a whole life span to change the land. Grow trees don't take them down. there are many things we can do to preserve the land. If only everyone would add a little more effort to accomplish the preservation of the formation of land. for further information on helping the planet go to http://www.savingplanetearth.org/ for more information on saving the world.





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