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Why do boats float?
EduBook Organización
- 3120 visitas
If we make a little boat out of a walnut shell, we see that it floats and we relate this to the fact that the walnut shell is less dense than water. But what about real boats? Some of them are huge,…
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Self-assessment T10 02 - Machines and structures
EduBook Organización
- 3084 visitas
Complete these sentences with the correct words: Some objects become electrically when we rub one against the other. Electrical current is the flow of through materials. A is needed to create the…
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Final self-evaluation 10 - Energy and industry
EduBook Organización
- 3014 visitas
Complete the following sentences with the missing words: The main elements of the industrial process are the , investment, , the of the company and . To make an industrial product, companies need raw…
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Sponges, cnidarians and echinoderms
EduBook Organización
- 2973 visitas
Sponges Sponges are the simplest type of animal that exists. They live in water and are attached to rocks on the seabed. Sponges are often irregular in shape. Their bodies have lots of small holes that…
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Self-assessment T13 05 - Science and technology
EduBook Organización
- 2956 visitas
Are these sentences true or false? Computers only work when they are connected to a network. The Internet is made up of two or three supercomputers. A computer is connected to the Internet via a modem…
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Enlightenment principles
EduBook Organización
- 1 lo usan
- 2624 visitas
Natural or moral equality is based on the constitution of human nature common to all men, who are born, grow, live and die in the same way. The first state that man acquires in nature, and that is…
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Look at this historical document showing some peasants in the Middle Ag...
EduBook Organización
- 2810 visitas
Look at this historical document showing some peasants in the Middle Ages and answer the questions: What type of historical document is it? What does it show? What clothes are the peasants wearing? What…
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Travelling Funfairs
EduBook Organización
- 2693 visitas
Groups of people called showmen travel throughout the year to different areas of the country to set up funfairs. These are called travelling funfairs, because they do not stay in the same place (the…
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