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Summaries - Waves. Light and sound
EduBook Organización
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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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End-of-unit evaluation - The First World War and the Russian Revolution ...
EduBook Organización
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At the beginning of the 20th century, economic rivalry between the nations and the colonies led to an increase in tension amongst the European states. An arms race began that eventually led to the…
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Complete. Democratic republic
EduBook Organización
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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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Did you know...
EduBook Organización
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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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Check. Materials that conduct and insulate heat
EduBook Organización
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Remember what you have studied in this section and answer the questions: What are the three ways by which heat is propagated? Give one example of each. Does matter move in convection? And in radiation?…
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The removal of cell waste
EduBook Organización
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4.1. What does excretion consist of? Cell activity produces waste products like carbon dioxide or urea. These substances are toxic for the organism if they accumulate. The function of excretion is…
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Look - The effects of heat
EduBook Organización
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This experiment shows what happens to an object when we heat it. Look at the pictures. In the first illustration, the metal ball passes through the ring. In the second illustration, the ball has been…
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Listening (FCE) - The Confession
EduBook Organización
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Listen to the first part of Chapter Seven. For these questions choose the best answer. When Basil Hallward came into the room, Dorian Gray was Why did Basil feel terrible the night before? Why did…
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Complete. Changes in temperature
EduBook Organización
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Complete the text explaining the factors that modify temperature: The factor with the most influence over temperature is , which is the amount of that comes from the Sun's rays. As these rays do not…
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Comprehension check (PET)
EduBook Organización
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Choose the correct answer, to the questions below. Why does Dr Jekyll begin waking up as Mr Hyde? Why doesn’t Mr Hyde want Dr Jekyll to kill himself? Why does Dr Jekyll think that the new powders do…