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Check. The emergence of new economic centres
EduBook Organización
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Remember what you have studied in this section and answer the questions: Which countries made up the world's economic centre at the end of the 20th century? Which countries have joined them in the…
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Self-evaluation 2 - Weather and climate
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Which concepts do the following definitions refer to?: It is the degree of warmth in the air due to solar radiation. It is a gaseous layer more than 1 000 kilometres thick that surrounds the Earth. It…
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Understanding the text - Wanted: dead or alive!
EduBook Organización
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Some years passed and there were more than 200 outlaws living in Sherwood Forest. Robin Hood was the hero of the poor. He continued robbing the rich to give to the poor. Robin Hood called this ‘The…
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Robinson Crusoe in films
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There are many films based on Defoe’s story of Robinson Crusoe. Here are some of them: The Adventures of Robinson Crusoe (1922) Robinson Crusoe (1946) The Adventures of Robinson Crusoe (1954) Man…
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Ocean dynamics
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3.1. How oceans and seas move The water in oceans and seas is always moving because of waves, tides and ocean currents. Waves Waves are caused by wind moving the water on the surface of the sea. The…
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Complete - Remember
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Complete: There are two types of machines: machines and machines. Levers, wheels, ramps and are examples of simple machines. Compound machines are made up of two or more machines working together.…
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The periodic table and chemical formulas
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5.1. The symbols of chemical elements Each one of the 118 known chemical elements has a name and is represented by a chemical symbol. These symbols consist of one or two letters (the first a capital…
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Characters - Understanding the text
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Who says what? Match the sentences with the characters. You can use each character more than once. “His heart isn’t very strong and he wants a boy to help him on the farm.” “I’m happy because…
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True/False. Characteristics of changes in matter
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Answer true or false. In a chemical reaction, one or more substances, called reactants, are transformed into other substances called molecules. The number and type of atoms after the reaction is…
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True / False. The 20th and the world today
EduBook Organización
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Are these sentences true or false? Human life changed more in the 18th and 19th centuries than during the 20th century. During the 20th century, the world's economy and population grew because of…