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The discovery of America
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Columbus arrives in America On 3rd August 1492, Columbus's three ships left the port of Palos in Huelva. After two months, they arrived on the island of San Salvador in the Bahamas. Columbus thought…
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Summaries - The 20th century and the world today
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1. Conflicts in the 20th and 21st century During the 20th century, there were two great wars: the First World War (1914-1918) and the Second World War (1939-1945). They were different from previous wars…
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Complete. The vertebrae
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Complete this text with the correct words: The vertebrae are 33 bones that form a column down the centre of our back, called the column. There are 7 bones at the top of the spinal column that form our .…
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True / False. How do muscles move?
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Are these sentences true or false? We only use our muscles to produce movement. When we produce movement or force, our muscles become shorter and thicker because they contract. When the muscle…
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Find out more
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There are other involuntary actions produced by neurons that spontaneously release nervous signals. An example of this is the nervous control of automatic breathing. We breathe because of two groups of…
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Self-assessment T10 10 - Machines and structures
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Are these sentences true or false? The structure of a building must be stable and resistant. The structure of many buildings consists of a system of girders, beams and pillars. The beams form the base…
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Complete. Objects reflect light
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Complete this text with the correct words: When light shines on an object, sometimes it passes through the object and other times it reflects off it. When an object light, we can see it. For example, we…
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Think and answer. Science and technology
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Think and answer: Describe what you can see in the photos. Give examples of scientific progress in the 20th century. Do you use the Internet? What do you use it for? What is an e-mail? How do you send…
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Complete. E-mail
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Complete this text with the correct words: E-mail (or electronic mail) is a system of sending from one computer to another. It is the most popular on the Internet. The person who sends the message (or…
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Completa. O clima galego
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Completa as seguintes frases con estas palabras : costa – observatorios – oceánico – climogramas – montaña – costa – montaña – regulares – abundantes O clima de Galicia é de tipo .…
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