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True / False. Maritime and air transport
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Are these sentences true or false? El Prat Airport in Barcelona is the largest airport in Spain. Barajas Airport in Madrid is one of the most important airports in Europe. Air transport is growing in…
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Keeping our lungs healthy
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We need to inhale clean air for our respiratory system to work properly. If there is less oxygen in the air, we have difficulties in breathing. This is why badly ventilated spaces are bad for our lungs.…
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Answer. Breathing
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In which part of the lungs are gases exchanged? How does oxygen reach our cells?
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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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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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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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Some search engines
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General: http: //www.google.com http: //www.yahoo.com http: //www.ask.com For children: http: //www.askkids.com http: //www.yahooligans.com http: //www.curiosos.com (in Spanish)
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Completa. Achados da Prehistoria galega
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Escribe o nome de cada un destes tipos de restos prehistóricos: Gravados en rochas que se utilizaban de marcadores de zonas importantes de pastos e rutas gandeiras, e de control do territorio:…
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Completa. Moluscos
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Cambia no texto as palabras subliñadas por outras que sexan correctas: A maioría dos moluscos posúe unha cuberta exterior dura, chamada valva . Con todo, nos gasterópodos , atópase debaixo da pel…
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Verdadeiro/falso. Como se alimentan as plantas
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Indica cales das seguintes frases son verdadeiras e cales son falsas: As algas e mais as carrizas non precisan raíces. Nos fieitos e nas fanerógamas as células verdes atópanse nas raíces. O zume…
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