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Calculate. Force and pressure
EduBook Organización
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Remember what you have studied in this section and answer the questions: What pressure is exerted on the ground by a person with a mass of 80 kg wearing skis with a total surface area of 0.6 m2? We have…
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Health
EduBook Organización
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Health and illness We say we are in good health when our body works well and we are not ill. Sometimes we get ill. When we are ill, we have symptoms, like a fever, headache or stomach pains. We say that…
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Check. Women and the French Revolution
EduBook Organización
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Remember what you have studied in this section and answer the questions: Which social reforms introduced during the Revolution benefited women? Make a list of the social classes and professions of the…
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True/false. Mosses and ferns
EduBook Organización
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Are the following sentences true or false? The difference between mosses and ferns is that the former cannot do photosynthesis. Mosses and ferns are both non-vascular plants. Mosses and ferns are both…
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Video game: Control of the Cell Cycle
Tiching explorer Organización
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In this game we are "Cell division supervisors", inside the cell nucleus, which means we have to steer the mitosis to make sure everything happens in the right order. In the introduction we…
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David's house
EduBook Organización
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Houses did not have electricity Clara's great-grandfather lived in a village when he was young. Great-grandfather David's house did not have electricity. People used oil lamps or candles to…
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Arthropods (I): characteristics
EduBook Organización
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4.1. Arthropods Arthropods are the most numerous and diverse group of invertebrates. They have adapted to all kinds of environments. The body of an arthropod has three parts: the head, thorax and…
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End-of-unit evaluation - Light and sound
EduBook Organización
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We perceive most of the things around us because we can see or hear them. Most objects do not have their own light. We see them because they are illuminated by light from natural and artificial sources,…
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Final evaluation 9 - The Hydrosphere
EduBook Organización
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Decide which of the following sentences are false and correct them: Some 97,4% of the planet's water is continental. More than 75% of the planet's fresh water is located in glaciers. Homes,…
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Peaceful coexistence
EduBook Organización
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You can like your neighbour or not. You are not obliged to become friends or pay him visits. But what do you do if neither of you want to move? There are only two options: war, which with today's…
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