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Introduction - Light and sound
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We perceive most of the things around us because we can see or hear them. Most objects do not have their own light. We see them because they are illuminated by light from natural and artificial sources,…
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Summaries - Waves. Light and sound
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1. Waves An oscillatory or vibratory motion takes place around a central position. It produces the same amount of movement on both sides of this position. A wave is the transmission of an oscillatory or…
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Enlightenment principles
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Natural or moral equality is based on the constitution of human nature common to all men, who are born, grow, live and die in the same way. The first state that man acquires in nature, and that is…
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Analyse. Guild regulations
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Read the text and answer the questions: Nobody can be a weaver if they have not first bought the profession from the king [...]. Each person may have two looms at home [...] and each son of a master…
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True/False. Work it out
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Copy only the true statements from the following list into your notebook and say why they are true: Coal and oil, as well as causing pollution, are running out and cannot be renewed. The water used in…
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Complete. Democratic republic
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Complete the sentences about the Democratic Republic with the missing words: In June 1791, Louis XVI fled Paris to join the Austrian army; this event is known as the Flight of . The radical group known…
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End-of-unit activities - The Plant Kingdom
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Plants are one of the most visible elements in the countryside. They provide colour, greenery and beauty where they live and flourish. Plants are not only decorative, but also essential life-giving…
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True/false. Insects
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Are the following sentences about insects true or false? The mouthparts of insects have adapted so that they can live underwater. Most insects have wings. Insect mouthparts are adapted to the different…
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Did you know...
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The Franco regime adopted the fascist term of 'organic democracy' to define its political system as opposed to a 'liberal democracy'. In this system, popular representation was not…
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Reading
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After dinner that evening Mrs Medlock calls Mary. ‘Your uncle is going away tomorrow and he wants to see you,’ she says. Mary is a little afraid. ‘Mr Craven isn’t going to like me,’ she…
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