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Completa. El sector primario
EduBook Organización
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Completa las siguientes frases con las palabras que faltan: La agricultura es la labor de la tierra. Apareció en el , hace unos años. El sector primario comprende las actividades de la agricultura, la…
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Interpreta. Población activa por sectores económicos
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Analiza la tabla y realiza las actividades: Indica si, en todos los países que figuran en la lista, la población que trabaja en el sector terciario es la más numerosa. Comenta las posibles…
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Introducción - Los fenómenos migratorios
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La característica más destacada de la población es su dinamismo: diversos factores, como la natalidad, la mortalidad y las migraciones han influido en su evolución a lo largo de la historia. Pero en…
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Reproduction in mammals
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3.1. Reproduction in mammals Mammals reproduce by internal fertilisation. They are viviparous. Males have a penis that they use to introduce sperm into the female's body. Fertilisation then takes…
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Think about it. The physical properties of matter
EduBook Organización
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Remember what you have studied in this section and answer the questions: Can solids be compressed? Give arguments for and against this idea. All materials expand when you heat them. Why? →…
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Calculate. The speed of light
EduBook Organización
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Calculate the distance in km that light travels in 20 s. d = km Calculate the distance in km that light travels in methacrylate in 20 s d = km If sunlight takes 8 minutes to reach Earth through the…
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Check. Light and colours
EduBook Organización
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Remember what you have studied in this section and answer the questions: What are the three primary colours of light? Why are they called this? What are the three primary colours of pigments? What do we…
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Did you know...
EduBook Organización
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Colonial society was structured according to race. Those born in Spain and their descendants in America (Creole people) were at the top of the social pyramid. There was also a rich bourgeoisie dedicated…
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Complete. The economy expansion
EduBook Organización
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Complete the sentences about economic expansion with the missing words: In the late 19th century, the low price of produced in the Americas caused an agricultural in Europe. The crisis was particularly…
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Identify. The sides in conflict
EduBook Organización
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Match each type of reform with the correct side in the Civil War: Agricultural reform was halted, and laws related to labour, society and autonomy were abolished. Committees made up of members of the…
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