ESL- School Year 2021-22

  The ‘YellowStone’ National Park mystery Could you ever imagine that the disappearance of large predators like wolves are considered responsible for the change of the landscape and absence of poplars along the banks of the Yellowstone lake in Montana?This fact brought about flooding in the lake and the erosion of land which sank into the lake. Researches revealed that there had been a widening of the shore, resulting in an important piece of land being vanished, since waters could not be restrained , and it was land which they couldn't afford to sacrifice. Old photos of the lake showed that there used to be poplars along the shore of the lake. But, how had the poplars vanished ? At  first it was thought that global warming was responsible, a claim which proved false, because of the presence of poplars a short distance away from the lake. Moreover, since poplars are known to flourish after arsons, there should be affluent trees, due to a large arson in the area in the late 20...

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  Around the world, mountains form, volcanoes erupt, and earthquakes shake. Why? The red dots popping up on the screen are recent earthquakes. When you see only a few, they may seem like they're all over the place. But over time you will start to see a pattern. The Earth's outer shell is divided into pieces called plates.  Most volcanoes, mountains, and earthquakes occur where plates meet. Places where plates meet are called plate boundaries. There are seven major plates along with countless minor plates. You can see that a plate can be made of both oceanic crust and continental crust. Interactions between the plates change our planet.  earth plates-on-the-move