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Choose. Atmospheric phenomena
EduBook Organización
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Match each phenomenon with its description: Movement of air from one place to another because of differences in the pressure between the two places. Water droplets and ice crystals that fall from clouds…
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Changes of state
EduBook Organización
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2.1. Changes of state of water Water is the best known example of a substance that occurs in the three states. Changes of state are caused by the action of heating or cooling (or changes in pressure).…
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Find out more. The Sahara conflict
EduBook Organización
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Spain's colony in the Sahara was very attractive to its neighbours, especially Morocco, owing to the region's wealth in terms of phosphates and fishing. In 1973 the Polisario Front was created,…
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True/false. The atmosphere
EduBook Organización
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Are the following sentences true or false? The Earth has always had the same atmosphere. The most abundant components of the atmosphere are carbon dioxide and water vapour. Everywhere in the…
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The temperature of the earth
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Inside the Earth, temperature rises when you get nearer to the centre. This increase in temperature is known as the geothermal gradient. It is calculated that in the outer layers, it is 1 °C for every…
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Final self-evaluation 10 - The Atmosphere
EduBook Organización
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Complete the following sentences with the missing words: Carbon dioxide provokes an increase in the greenhouse effect. Acid harms lakes, rivers, forests and buildings. Atmospheric pressure is measured…
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Volcanoes - Volcanoes
EduBook Organización
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A volcano is an opening (a vent) in a planet’s surface, which allows hot magma (liquid rock), ash and gases to escape. This event is called a volcanic eruption. During an eruption, pressure in the…
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