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Did you know?
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In a hermaphrodite animal, the same individual produces eggs and sperm. Cross-fertilisation usually takes place in these animals: two individuals mate and each one behaves like a male and a female at…
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The need for energy. Sources of energy
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3.1. The need for energy through history In prehistoric times, human beings, who were nomadic hunter-gatherers, needed no other energy than fire to keep them warm and cook their food. Centuries later,…
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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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Analyse. Learn to build and calibrate a thermometer
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To build a simple alcohol thermometer you can use a conical flask containing alcohol (mercury is toxic), and a capillary tube. Equipment A container to boil water, two beakers, ice cubes, a capillary…
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Calculate. The nature of light (1)
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Calculate how far light travels in air in 20 s. In 20 s, light will travel .
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The American Revolution
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5.1. The American War of Independence The United States of America has its origin in the thirteen colonies the British possessed on the east coast of North America. They were mostly inhabited by a…
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Find out more. Caciquism and electoral fraud
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The bipartisan system based on the turno pacífico depended on election rigging and caciquism, a form of social coercion. Caciques were individuals who controlled an electoral constituency through their…
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Neoclassicism
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Neoclassicism was a movement in Europe between 1760 and 1830 that was inspired by Enlightenment thought, the Revolution in France and the discovery of ancient archaeological sites during that period.…
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Justifying the military coup
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Long live Spain and long live the king! We do not need to justify our actions, which the good people demanded. [...]
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The rebels' objectives
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The government formed after the coup must be completely apolitical, made up of military personnel (...). The first order of business will be revising recently passed legislation, especially that related…
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