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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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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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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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Answer. Electrical current
EduBook Organización
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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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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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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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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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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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