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Learn. Spontaneous generation
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How did Pasteur prove that the theory of spontaneous generation of living things was false? Why do we need to use heat to sterilise surgical instruments? Explain your answer.
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The sense organs adapt
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2.1. The sense organs The sense organs receive stimuli from the environment. They are usually found close to the surface at the front of the body. An animal's sense organs determine how it perceives…
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Calculate. Matter and its properties (2)
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Calculate the mass of water produced when 20 g of hydrogen reacts completely with 160 g of oxygen. g of water.
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Answer. Forces
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Look at the different formulas and answer the questions: Which forces have the same meaning as F1? Which forces have the same magnitude as F1? Which forces have the same direction as F1?
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Think about it. Light and colours
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Remember what you have studied in this section and answer the questions: Why is snow white, coal black and grass green? → ...is... because it reflects... and absorbs... If light from the Sun can be…
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Interpret. Population of Europe
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Describe the population growth in each country for each period: → grew from... to.../ grew more than... /The greatest growth took place in...
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True/false. Bourgeoisie and workers
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Are the following sentences true or false?: The bourgeoisie became the ruling class, many of whom owned property and factories. The conditions of the petty bourgeoisie were not much better than those of…
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Identify. The symbols of Carlism
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Look at the cartoon of Carlist supporter and do the activity: Match a number with each Carlist symbol in the cartoon:
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On colonialism
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There is another point that we should consider: the humanitarian and civilising effects [of colonisation]. We should all agree that the superior races have rights over the inferior races, because they…
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Match. Main concepts of the imperialism
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Match each definition with the correct concept: European population that permanently emigrated to the colonies. Meeting in which the European colonial powers discussed how they would distribute African…
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