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Recursos educativos
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Introdución - O misterio das voces do espazo
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Desde sempre o ser humano soñou con explorar e dominar novos mundos. Explorado o planeta Terra, o soño era a conquista do espazo exterior e ver se a vida era posible noutros planetas. Logo de…
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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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Using our muscles
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Atrophy occurs when we do not use our muscles very much for a long period of time. Our muscles atrophy if we break an arm or leg because the cast stops us from producing movement and we cannot use those…
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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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Self-assessment T9 01 - The skeletal-muscular system
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Match the numbers to the correct part of the skeleton: immovable joint movable joint semi-movable joint short bone long bone flat bone
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Look and answer. Brain and spinal cord
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This diagram of the brain and spinal cord also shows the bones that protect them: Which bones protect the brain? Which bones protect the spinal cord? Why is it important to protect the central nervous…
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Summaries - Machines and structures
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1. Electrical current An object becomes electrically charged when it contains an electrical charge. Some objects become electrically charged when we rub one against the other. For example, when you rub…
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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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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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Answer. Science and technology in today's world
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Name some important advances in physics, chemistry and medicine in the 20th century. Name one advance in communication technology. Why is it important?
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