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Complete. Basins and archipelagos
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Complete these texts: The lands formed from basins are very because sediment from are deposited there as well as those of origin. The Ebro basin, for example, was a many years ago, and that of the…
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Molluscs
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Worms Worms are animals with long, soft bodies and moist skin. They do not have legs; they move by wriggling. Most worms live in the sea or in fresh water. Some live on land, like earthworms. Some worms…
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Why do boats float?
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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
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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
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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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Video: Refugee Mythbusting animation
Esl video Organización
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This 2 minute video is about asylum seekers who are rejected by Australian government. They are considered illegal, a burden on the economy, in spite of the fact that every person has a right to seek…
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Self-assessment T13 05 - Science and technology
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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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Sponges, cnidarians and echinoderms
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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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Speaking (PET)
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Look at the pictures. Work with another student and choose one of the pictures. Study your picture for one minute. Then tell each other about your picture. Here are some questions to help you: Who is in…
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Machines
EduBook Organización
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Brakes. Vehicles have brakes to reduce speed or stop. Bicycles and cars have brakes. Machines. There are simple and compound machines. They make our work easier. Compound machine. Compound machines are…
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