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...

Click to do the exercise after you watch the video

  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

 

Worksheet   Answer the questionnaire

 DISPILIO- A lakeshore settlement

  A river is a ribbon-like body of water that flows from high land downhill. It is a geographical feature. Gravity is what causes a river to flow. A river can be wide and deep, or shallow enough. A flowing body of water that is smaller than a river is called a creek or stream. The largest rivers can be thousands of miles long.  As the water flows along the river bed the land is worn away, it erodes. Erosion of rivers can form geologic wonders like the Grand Canyon. All rivers have a starting point where water begins its flow, the source. Water can come from rainfall or snowmelt in mountains, but it can also bubble up from groundwater. The other end of a river is called its mouth, where water empties into a larger body of water, such as a lake or ocean.   A tributary is a river or stream that flows into another stream, river, or lake. The river loses its velocity as it gets lower and deposits different particles or sediments at its mouth. However, rivers still carry i...

  Water Cycle Step #1: Water evaporates from the Earth’s surface . If you spill a glass of water outside you will notice that a few hours later the water is gone! That is because water slowly turns from a liquid into a gas called water vapour. The process of water turning from a liquid into a gas is called evaporation. Evaporation happens faster on a hot day. That is because the evaporation of water outside takes energy from the sun! The hotter it is outside, the faster water will evaporate. Since water in its gas form has no colour, we cannot see it. It just goes into the air. Water Cycle Step #2: Water condenses to form clouds Water vapour rises up in the sky due to the sun’s heat. Once the water vapour rises high enough it condenses into water droplets. Condensation is the process of water turning from a gas into a liquid . You have probably experienced condensation if you have had a cold glass of water at a restaurant. As the cold glass sits on the table, water vapour from the...

Worksheet   A guide to climate change

 1. Why is the temperature not the same in all places on Earth? Because the Sun is so big compared to the Earth, only the rays that come straight at the Earth will hit it. Areas of the Earth that are hit by direct rays are warmer than areas that are hit by indirect rays. 2.What factors does the air temperature of a place on Earth depend on? A) On the distance of the place from the Equator: the air gets colder as we move away from it and approach the poles (with increasing latitude). B) On the altitude of the place: the air gets colder as we get to a higher altitude. C) On the distance of the place from the sea: The land heats up and cools faster than the sea-so the air above the land is warmer in summer and colder in winter. On the contrary, in the same place, above the sea it is cooler in summer and warmer in winter. 3.What do we call winds and where do they owe their creation? Winds are the lateral and vertical movements of the wind. They are due to: the temperature differences b...

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Click to read the process of leaves' colour change How students perceive the phenomenon

  Click to read the story of Jack and the Devil

What is a map? A map presents information about the world in a visual way. It shows the shapes of countries, the distances from one place to the other, locations of lakes, seas, mountains, streets, rivers and many more. Kinds of maps There are different kinds of maps:  Physical: they show the physical features of an area eg. mountains, rivers, lakes,etc Political : they show the states, national boundaries , capital and major cities etc Thematic : they give details of different aspects like weather, time, industries etc Elements of a map: The title gives basic information about the map. A legend or key explains all symbols used in a map. legend A map's scale shows the relationship between distances on the map and the real distances. scale A map always shows the cardinal directions with the aid of a compass rose. The upper part of a map shows the north, the bottom part of a map shows the south, the left part of a map shows the west and the right part of a map shows the east. comp...