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Introduction - The Atmosphere
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The Earth is surrounded by a mixture of gases we call the atmosphere. The air we breathe is part of the atmosphere. The atmosphere is composed of a series of layers. The most important layer is the…
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Analyse. Recycling oil
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Read the text and answer the questions: We use vegetable oil at home to fry food. We often have leftover oil that we no longer use. Sometimes we pour it down the sink, where it travels along the pipes…
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Minerals (II)
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3.1. Mineral properties Mineralogy is the science of studying minerals. Minerals can be identified according to their physical and chemical properties. The most important properties are density,…
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Evolution and biodiversity
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1.1. The great diversity of living things Species can change. They undergo a gradual transformation over time. This change is known as biological evolution. Biological evolution is due to a series of…
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Fossils
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Fossils are the remains or signs of activity, such as excrement and footprints, of organisms that lived in the past. These remains or signs have been preserved in rocks. Fossils help us to know which…
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Answer. Echinoderms 3.2
EduBook Organización
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Echinoderms do not have feet but they can move around the seabed. Explain how these animals move.
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Unit 12: The Animal Kingdom (II). Vertebrates
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Aerodynamic (adj): designed or shaped in a way which reduces resistance to the air. anuran (n): an amphibian without a tail. beak (n): the hard part of the mouth of a bird. biped (n): an animal with two…
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Analyse. Rainfall in Spain in 2007
EduBook Organización
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Look at the map and answer the questions: Which meteorological station in Spain recorded the most rainfall in 2007? Where in Spain was the rainfall higher than 1000 mm during the year? Where on the…
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Classify. Supply and demand
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Increases in food prices are due to an imbalance in supply and demand. Decide whether the concepts below that cause an increase in food prices are caused by issues related to supply or demand:…
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Match. Traditional sources of energy 01
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Which type of traditional energy source does each statement refer to? Its high calorific value means it is the most widely used form of energy. Today its use is restricted to producing thermal energy.…
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