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Match. Nervous actions
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Are these nervous actions voluntary, involuntary or reflex actions? Turning on the light in your bedroom. Blinking when an insect flies near your eyes. Controlling your breathing after running. Sneezing…
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Answer. Electrical current
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How can objects become electrically charged? What is electrical current? What is needed to create the electrical current? What is a conductor? And an insulator? Name the parts of an electrical circuit.…
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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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Initial evaluation T13 01 - Science and technology
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Look at the pictures of advances in science and technology and point if each one is related to physics, medicine, chemistry or communication technology:
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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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Vermes e moluscos
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Os vermes Os vermes son animais de corpo alongado, brando e sen patas. A súa pel é húmida. A maioría dos vermes viven no mar ou en auga doce, como a sambesuga; soamente uns poucos viven en solos…
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O caracol, un animal hermafrodita
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Nos caracois, cada individuo é ao mesmo tempo macho e femia. Durante a unión sexual entre dous caracois, ambos os dous colócanse un fronte ao outro, unidos polo pé. Cada un deposita os seus…
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Responde. O desenvolvemento e o coidado das crías
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Lembra o que traballaches neste apartado e responde: Cita dous exemplos de animais que cheguen a adultos por desenvolvemento directo e dous de desenvolvemento indirecto. En que animal adulto se…
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La geosfera
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De què està formada la geosfera La geosfera està formada per roques. Una roca és un material natural, generalment dur i dens, format per diferents substàncies químiques anomenades minerals. El…
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