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Recursos educativos
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La comunicació: definició i elements
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La comunicació: definició i elements La comunicació. Les funcions del llenguatge
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The formation of seeds and fruits
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5.1. The formation of the seed After fertilisation, the petals, sepals and stamens wither and fall off. The style and the stigma often also fall off. Only the ovary remains, containing the fertilised…
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Analyse. A text
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Polyembryony Polyembryony is a type of sexual reproduction in which an embryo fragments into several identical embryos. They each develop independently. The young of each litter are of the same sex, as…
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True or false. States of matter
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Answer true or false: The particles are less tightly bound together in a solid. The particles in a gas move very quickly. All systems are composed of material particles. Liquids are compressed and…
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Check. Mass and weight
EduBook Organización
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Remember what you have studied in this section and answer the questions: What is gravity? Where do we see examples of the force of attraction between bodies? Discuss.
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Calculate. Pressure
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Calculate the pressure exerted on snow by the feet of a man with a mass of 81 kg if you know that the total surface area of the soles of his boots is 0,6 m2? Note: g = 9,8 m/s2. P = Pa
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Choose. Upthrust and buoyancy
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Choose the correct answer: What equals the upward thrust experienced by a submerged object in a liquid? What is the apparent weight of an object? What happens if the weight is less than the upward…
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Think about it. Sound
EduBook Organización
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Remember what you have studied in this section and answer the questions: Why do we say that sound transports energy? What kind of energy is it? If we put our ear close to a railway track, we know that a…
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Complete. The concept map
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Complete the concept map: Answers 3 and 4 must be sorted in alphabetical order.
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Peasant revolts
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We believe that peasants should not seek any other economic goal but the fairest distribution of land and farming equipment. Our hope lies with the Andalusian peasants, who we consider capable of…
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