Recursos educativos water página 38

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Summaries - Rivers and seas
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1. Water in nature Some 97.21% of the planet’s water is salt water and is found in: Oceans: large bodies of water that separate continents; there are five oceans on Earth. Seas: extensions of the…
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Renewable sources of energy
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6.1. Water power Hydroelectric power stations obtain electrical energy from water power (figure 1). Water is a resource which does not run out: the water cycle constantly renews the water on our planet.…
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Answer true or false
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Answer true or false: Water is present in three states in nature. → Water vapour is water in a gaseous state. → Rain and dew are water in a solid state. → Seas are bigger than oceans. → We can…
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Check. Rivers and seas
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After reading the text for this introduction, answer the questions: What is the hydrosphere? Water is the most abundant substance on the planet. What forms does it take? What is more abundant, fresh…
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Final self-evaluation 9 - The Hydrosphere
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Complete the following sentences with the missing words: Drinking dirty is a major cause of illness. Human beings should only consume water. Three quarters of the Earth's is covered by oceans. Waste…
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Before you start - The Hydrosphere
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Didactic objectives Learn about the hydrosphere and the properties of water, and know how to associate them to phenomena and natural processes, some of which are essential to life. Differentiate between…
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Did you know?
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When we want water, we just turn on the water tap and out it comes. But water is a very scarce resource. We should not waste or pollute water. Remember, more than 2 billion people do not have access to…
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Quick revision
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External forces such as wind and water change the shape of the Earth's surface. Water is the main external agent on the land. The action of water creates ravines, valleys, plains, deltas, caves,…
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Think - Living things and their habitat
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Look at the photos and answer the questions. Can these animals survive without water? Explain your answer. How long do you think each animal can survive without water? How long do you think humans can…
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Check what I know
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Answer true or false: Metal contracts when it is hot. → Water expands when it is cold. → Warm clothes are heat conductors. → Water boils at 100°C. → Heat makes objects change…
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