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Check. Test yourself
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Remember what you have studied in this unit and answer the questions: Are average velocity and instantaneous velocity the same? When? Why? What effects do forces produce? Give several examples of these…
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Check. Test yourself
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Remember what you have studied in this section and answer the questions: What is the difference between binary fission and budding? What types of asexual reproduction are often seen in plants? How do we…
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Find out more
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Energy can be converted from one form of energy to another. For example: Electrical energy is converted into heat energy by heaters and cookers, and into light energy by lamps. Electrical energy can…
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A country governed by property owners
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We must be governed by the best, the best are the most educated and most interested in keeping the laws. However, with few exceptions, the only men with these features are those who have property, who…
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Renewable energy sources
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Energy sources that will not run out are called renewable energy sources. Some examples are the Sun, water and wind. The energy that we obtain from renewable sources is called clean energy because it…
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Remember - Energy
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We need energy to move. Humans get energy from food. Machines get energy from petrol or electricity. The Sun is a natural source of energy. We call the Sun a renewable energy source because it is…
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Comprehension - Exit Test
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Are the following sentences true or false? A cyclone picks up Dorothy’s house and takes it into the sky. Dorothy meets the Good Witch of the North in the Land of The Winkies. The Scarecrow is afraid…
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Understanding the text - Excalibur
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Arthur rode away with Merlin and said, ‘I broke my sword during the fight with Sir Pellinore. I am king because of that sword. I must have another sword.’ ‘Come with me then,’ said Merlin.…
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Activities - Spain
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Spain is in the south west of Europe. It includes most of the Iberian Peninsula, the Balearic Islands, the Canary Islands and the cities of Ceuta and Melilla in North Africa. Spain has borders with…
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Climate change - Society and the environment
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What is climate change? Climate change is the combination of changes in the Earth’s climate because of an increase in the planet's temperature. Examples of these changes are rising sea levels or…
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