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The removal of cell waste
EduBook Organización
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4.1. What does excretion consist of? Cell activity produces waste products like carbon dioxide or urea. These substances are toxic for the organism if they accumulate. The function of excretion is…
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Think about it. The removal of cell waste
EduBook Organización
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Remember what you have studied in this section and answer the questions: Why do sponges and coelenterates not need excretory organs? What is the difference between defecation and excretion? Why is more…
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Check. Changes in matter
EduBook Organización
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List the differences between physical and chemical change. Give three examples of each.
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Calculate. Pressure
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Calculate the pressure exerted on the floor a box of mass 150 kg whose base has an area of 3 m2: P = Pa
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Final Autoevaluation T12 02 - Waves. Light and sound
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Answer these questions: What is the phenomenon of reflection of light? And refraction? Why do we see the grass as green or a red apple?
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Find out more. Railway stations
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Railway stations were the most emblematic buildings of the late 19th century. They played a central role in modern cities and provided direct access to them. Stations had to be spacious, bright and…
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Initial evaluation T8 04 - The First World War and the Russian Revolutio...
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Read the following and explain what type of government existed in Russia around 1900: “Autocracy (...) does not respond to the needs of the Russian people (...). [...]
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Describe. The Great Depression in the USA
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Look at the diagram and explain how the Great Depression happened and what was done to solve it.
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Condemnation
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As we are convinced that Franco's fascist government in Spain was imposed by force on the Spanish people, with the aid of the Axis powers, and which gave material assistance to the Axis powers…
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Analyse. Concentration of powers
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What were the three branches of power under Francoism? How were they controlled? Was it a democratic system? Why or why not?