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- Decadencia del imperio Romano
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Complete. The bloodstream
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Complete this text with the correct words: In pulmonary circulation, blood passes from the right ventricle to the lungs through the artery. In the lungs, the blood expels carbon dioxide and collects .…
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Complete. Blood circulation and the heart
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Complete these sentences with the correct words: The heart contains four . The allow blood to pass from the atrium to the ventricle, but not in the opposite direction. The human bloodstream follows a…
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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 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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Introduction - Light and sound
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We perceive most of the things around us because we can see or hear them. Most objects do not have their own light. We see them because they are illuminated by light from natural and artificial sources,…
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Answer. Light and sound
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Answer the following questions in your notebook: What is light? Which of our senses perceives it? What does our image look like in a mirror? What do we use a magnifying glass for? Why do objects have…
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Verdadeiro/falso. Agricultura, minaría e comercio en época romana
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Sinala cales das seguintes afirmacións son verdadeiras e cales son falsas: Os romanos melloraron as técnicas agrícolas de iberos e celtas. Os romanos introduciron un novo sistema de arado e técnicas…
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As nosas terras na Idade Media
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O reino suevo de galicia No século V, as terras galegas foron ocupadas polos suevos, que organizaron un reino independente máis alá das actuais terras galegas. Nesta época fundáronse os primeiros…
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