Recursos educativos species página 19

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Fossils
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Fossils are the remains or signs of activity, such as excrement and footprints, of organisms that lived in the past. These remains or signs have been preserved in rocks. Fossils help us to know which…
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The first humans. The Palaeolithic Age
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1.1. Human evolution About six million years ago in Africa, some primates began to adapt to new climatic conditions. These first hominids evolved over time into human species. The most important changes…
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Learn. The life cycles of animals - Animal reproduction
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The term life cycle refers to all the phases that take place throughout the life of a species. If development is direct, the juvenile forms look like the adults. If it is indirect, they undergo…
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Protecting the environment - The natural environment
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There are many reasons why we should protect the environment. We should protect the habitat of endangered species, but we should also protect the environment because our future depends on it.…
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Final self-evaluation 05 - The Spanish economy
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Complete the following sentences with the missing words: According to the regulations included in the EU's Policy, Spain has had to make important changes to its agricultural sector, particularly…
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Temperature and insect growth
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The body temperature of an insect varies according to the temperature of its surroundings. This is why insects grow more quickly in summer and more slowly in autumn and winter. Each species has its own…
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Pollination, fertilisation and the formation of seeds
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Pollination Sexual reproduction in plants occurs when a spermatozoid meets an ovule. For this to happen, the pollen grains need to travel from the stamens to the pistil. This process of transferring…
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Humanism
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1.1 A new way of thinking Humanism was a cultural movement that began in Italy in the 15th century. Its main characteristics were: A belief in the importance of the human being as the only species with…
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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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Geological Time (Part 1) - Geological Time (Part 1)
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Life on Earth originated about 2 billion years ago, but the earliest good fossils come from the Cambrian period, which began about 570 million years ago. The Cambrian Period The climate at the beginning…
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