Recursos educativos página 22108

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The extinction of the dinosaurs
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In 1980, American scientists proposed that the cause of the extinction of the dinosaurs, which occurred about 65 million years ago, was the result of a meteorite hitting Earth. According to this…
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Answer. The air and its components 4
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Where does the water vapour in the air we breathe come from?
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True/false. The Earth's surface
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Are the following sentences true or false? The crust is the Earth's most solid layer. The Earth's crust can be separated into two areas: the oceanic crust and the continental crust. The surface…
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Look. Life 550 million years ago
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Describe the animal life shown in the picture. Which of the animals in the picture are similar to animals living today? Some organisms in the picture have disappeared. What factors could have caused…
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Answer. Bacteria and humans 4.5
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Which bacterial illnesses are related to food? How are these illnesses caught? Explain how food can be contaminated.
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Complete. Mosses
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Complete the following sentences with the missing words: Mosses are small -vascular plants. Mosses have a sexual reproduction phase, then an reproduction phase. Mosses have no vegetative , such as…
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Find out more... Gymnosperms
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The cypress tree is a conifer of the northern temperate region. It is evergreen with needle leaves. The yew tree can reach up to 20 m in height and can live for 1500 years. Firs are especially abundant…
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Structure of a tapeworm
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Adult tapeworms are intestinal parasites of vertebrates. They have a very simple structure. Tapeworms do not have a respiratory, circulatory or digestive system. Their body is ribbon-shaped, with a head…
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Summaries - The Earth's surface: shaping human activity
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1. Continental relief: the great land masses The continents are the large land masses that separate the oceans. There are six in the world: Africa: mountainous with many plateaus and basins with rivers…
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Classify. Democratic and non-democratic
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Choose whether these concepts and sentences reflect a democratic or non-democratic attitude: Freedom of thought. The poor cannot vote. More than one political party. The rich can vote twice. Equality.…
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