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El pronom relatiu
EduBook Organización
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El pronom relatiu Oracions subordinades adjectives
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La variació lingüística
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La variació lingüística La sociolingüística
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Think about it. What plants need
EduBook Organización
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Remember what you have studied in this section and answer the questions: Why do plants sometimes need fertilisers to grow well? How does the way trees and animals get food differ? Which are autotrophs…
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Check. Abiotic factors
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Remember what you have studied in this section and answer the questions: Copy the table and complete it. Use the information from the table to ask a classmate questions: → Which factors are climatic?…
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Analyse a photograph
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This photo shows an eruption of Mount Etna, in Sicily. Describe what you see in the photograph. Notice the lava flowing down the mountainside. What is it like? Do you think there could be any towns or…
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Talk about it. Obtaining and using energy
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Look at the pictures and answer the questions: Is the Sun a source of energy? And a bonfire? List five sources of energy. Which of them could run out? Will we always have oil to use? Name a source of…
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The need for energy. Sources of energy
EduBook Organización
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3.1. The need for energy through history In prehistoric times, human beings, who were nomadic hunter-gatherers, needed no other energy than fire to keep them warm and cook their food. Centuries later,…
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Choose. The history of energy
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Choose the correct answer: What was the first source of energy for humans? Which machine ushered in the industrial revolution? What is the most important source of energy for the Earth, and not just for…
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Summaries - Heat and temperature
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1. Energy transfer: heat Heat or thermal energy is the energy that is transferred from hot bodies to cold bodies. All the particles that make up bodies have internal energy; the particles in a hot body…