Recursos educativos página 18159

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Contesta. Cucs i mol·luscs
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Recorda el que has treballat en aquest apartat i contesta: Com són els cucs? On viuen la majoria? Com és el cos d'un mol·lusc? Què és la closca? Explica quina funció té la closca en els…
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Per saber-ne més
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Cada vegada que un ovari expulsa un òvul, la capa interior de l'úter s'engruixeix per rebre el zigot. Si no és fecundat, l'òvul es mor al cap de pocs dies i surt per la vagina juntament…
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Contesta. L'energia
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Recorda el que has treballat en aquest apartat i contesta: Què és l'energia? Per què l'energia és necessària? D'on s'obté l'energia? Escriu cinc exemples de recursos…
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Coasts
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The coast of Spain Spain has a long coastline. There are 3904 km of coastline on the Peninsula, 910 km on the Balearic Islands and 1126 km on the Canary Islands. The coastline of Spain is surrounded by…
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Interpret. Climate chart for Madrid
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Look at the climate chart for Madrid and answer the questions. What is the average temperature in the hottest month in Madrid? And in the coldest month? In which month does it rain the most? And the least?
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Vertebrates
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Characteristics of vertebrates Vertebrates are animals that have a spine (backbone). The spine supports the body. Vertebrates have an internal skeleton that is articulated: it is made up of bones…
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Answer. Plant nutrition
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Remember what you have studied in this section and answer the questions: What is photosynthesis? Why are chloroplasts green? How do algae and mosses get the water and carbon dioxide they need? How do…
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Select. The fetus
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Choose the correct answer to the following question: In what stage of pregnancy does the fetus start to look like a baby?
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The metamorphosis of a butterfly
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This diagram shows the metamorphosis of a butterfly. After it is born, the butterfly goes through three stages: Larva (caterpillar): it hatches from the egg and begins eating and growing. Pupa…
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Different types of corolla
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The petals of a flower usually all look the same, like the wild rose. Some flowers have a very distinct shape, as in the example of the broad bean. Other flowers, like tulips, have similar petals and…
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