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La ganadería en el mundo
EduBook Organización
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5.1. La ganadería La ganadería consiste en la cría de animales para obtener una serie de productos como carne, leche, huevos, cuero, lana, etc. Los animales también se emplean como fuerza de trabajo…
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Introducción - Revoluciones liberales y movimientos nacionalistas (1789-...
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Las nuevas ideas ilustradas y el crecimiento económico del siglo XVIII propiciaron una época de profundas transformaciones políticas en Europa. Este proceso se conoce como revolución liberal burguesa. [...]
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Check. The removal of cell waste
EduBook Organización
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Remember what you have studied in this section and answer the questions: Ask a classmate to define the key words. Which animals have excretory organs and which animals do not? Present your information…
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Reproduction in living things
EduBook Organización
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1.1. Types of reproduction Reproduction in living things ensures that the species will continue. There are two basic types of reproduction: Sexual reproduction takes place when sex cells, known as…
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The natural environment
EduBook Organización
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1.1. The energy of the sun and life The ecosphere is a hypothetical zone existing around any star where the temperature allows life to exist. The conditions which make it possible for life to exist on…
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Check. Test yourself
EduBook Organización
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Remember what you have studied in this unit and answer the questions: Define ecosphere and biosphere. Note down the differences between them. What are decomposers? Give an example. [...]
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Summaries - Matter and its properties
EduBook Organización
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1. Matter Matter is anything which has mass and volume. For example, the Sun, the Earth, and human beings are all made up of matter. A physical system is any part of the Universe which is made up of…
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Choose. Changes in matter
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Choose what type of change is taking place in each of these situations: A fire becomes smoke and then ash. A block of ice melts. An iron object let out in the weather develops a layer of rust. A piece…
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True/false. Decline of monarchy and dictatorship
EduBook Organización
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Are the following sentences about the decline of monarchy and dictatorship true or false?: After the crisis of 1917, politicians from different parties joined together to combat the post-crisis…
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