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Self-assessment T10 08 - Machines and structures
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Complete the text with the correct words: A is an instrument that we use to make our work easier. We operate tools using our . Humans used , bones and sticks to make the first tools. These included…
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Video: How can cookies make your surfing experience convenient?
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Cookies are convenient because they make it easier to gather information about the web surfing history of a visitor and provide a better user experience. In this 2 minute video, we’ll see what cookies…
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True / False. Tools
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Are these sentences true or false? A tool is an instrument that we use to make our work easier. We operate tools using our hands. Humans used rocks, bones and sticks to make the first tools. When humans…
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Self-assessment T10 06 - Machines and structures
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Are these sentences true or false? Levers are compound machines which are made up of three elements: the load,the effort and the fulcrum. In first-class levers, the fulcrum is located between the effort…
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Reptiles
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3.1. Reptiles: adapting to the land Reptiles were the first vertebrates to adapt to land and become independent of water. Some examples are lizards, snakes and tortoises. Their main adaptations to life…
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Chemical reactions
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What is a chemical reaction? Chemical reactions are processes that turn certain substances into other substances. These are the products of the reaction. Heat is sometimes a product of the reaction.…
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The third conditional
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‘It would never have happened if I had not met you.’ ‘It would never have happened if I had not met you.’ The third conditional is used to talk about something in the past which cannot be…
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Understanding the text Ch 2 05
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Look at this sentence: King Richard was unable to free Jerusalem. In English we often put the prefix ‘un’ before a word to mean ‘not’. Look at these examples: King Richard was not able to return…
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Remember...
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Types of urban street plans Irregular plans This plan does not have a system of organisation. The streets are windy with dead-ends, alleyways and courtyards. Muslim cities and the older parts of town in…
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Minerals (I)
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2.1. What is a mineral? Minerals are solid and inorganic substances which have a particular chemical composition. They are formed naturally. Minerals are characterised by their perfectly ordered…
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