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Recursos educativos
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Nivel educativo
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Competencias
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Tipología
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Tipo de medio
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Meteorites
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Most meteorites burn up quickly in the thermosphere, giving off a bright light, due to friction with the atmosphere. They are known as shooting stars.
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The formation of the Earth atmosphere
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In the beginning, our planet had no atmosphere. As the Earth cooled, various gases were produced. These gases formed the first atmosphere. Oxygen appeared when the first plants began to produce oxygen…
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Reflect. Pressure and climate 2
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Is the air pressure at the top of a mountain higher or lower than the air pressure at sea level? Explain your answer.
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Answer. Water on our planet 4
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What percentage of the planet's surface is occupied by water?
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True/false. Metamorphic rocks
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Are the following sentences true or false? Metamorphic rocks come from the solidification of magma. Metamorphism is caused by changes in volume. Marble is formed from metamorphosed clay. In many…
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Answer. The Earth, a living planet 8.3
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What are natural resources? What would you do to promote a rational use of natural resources?
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Initial evaluation 3 - The Diversity of Life
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Match each organism with the kingdom it belongs to: mushroom moss mollusc bacteria protozoa
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Answer. Arachnids, myriapods and crustaceans 5.1
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What makes crustaceans' exoskeletons so hard?
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Reflect. Characteristics of fish 1.1
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Why do people fishing stay quiet while they fish?
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