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Mostrando resultados de 965
  • Answer. Non-renewable energy sources | Recurso educativo 571599

    Answer. Non-renewable energy sources

    EduBook Organización

    • 1489 visitas

    Remember what you have studied in this section and answer the questions: What will happen if we use too much of the Earth’s non-renewable sources of energy? What materials can we make with oil? What…

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  • Analyse. A text | Recurso educativo 483486

    Analyse. A text

    EduBook Organización

    • 1448 visitas

    Energy and sustainable development The way of life in developed countries requires huge quantities of energy. If non-renewable sources of energy continue to be used up at the current rate, they will be…

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  • The Socialist programme | Recurso educativo 484923

    The Socialist programme

    EduBook Organización

    • 1446 visitas

    The general crisis, in addition to our deficient economic structure, which is a legacy of the past, means that today we face four fundamental problems: unemployment (…), inflation (…), a balance of…

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  • The depletion of the ozone layer | Recurso educativo 565511

    The depletion of the ozone layer

    EduBook Organización

    • 1439 visitas

    In the 80s, a decrease in the thickness of the ozone layer over Antarctica was detected. This rate of decrease has continued. Scientists believe that the original concentrations of ozone will be…

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  • English Bites / Weather Man

    Xtec Organización

    • 1420 visitas

    Meet someone whose job is to predict what the weather will be like. Farmers in Southern Australia who've just endured the worst drought in a hundred years and are now being buffeted by regular,…

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  • Work on gravity | Recurso educativo 483397

    Work on gravity

    EduBook Organización

    • 1413 visitas

    Here is a link to a simulation which will enable you to work on the forces of attraction between masses: www.tiching.com/100615 Use this simulation and explain the differences observed in the magnitudes…

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  • Observe. Spain's population | Recurso educativo 584714

    Observe. Spain's population

    EduBook Organización

    • 1413 visitas

    Look at the photos and answer the questions: What do the photos show you about Spain's population today? Which factors cause a population to increase? What makes it decrease? In this unit, we will…

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  • Listening - The text and beyond

    EduBook Organización

    • 1468 visitas

    You will hear a conversation between two students. Listen and decide if the following sentences are true or false. Sally thinks that Hyde escaped. John thinks that Dr Jekyll killed Hyde. Sally thinks…

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  • CERN. Educational / The time machine : the LHC adventure is a journey through time ....

    Xtec Organización

    • 1352 visitas

    Archaeological findings at one LHC site take us back some 1700 years. Civil engineers dug through rock that dates from about 208 to 144 million years, and the LHC's collisions will complete the…

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  • Calculate. Minerals (2) | Recurso educativo 565780

    Calculate. Minerals (2)

    EduBook Organización

    • 1374 visitas

    Manganese is a mineral formed at the bottom of the sea. It is found in the form of different sized nodules. If we know that each nodule grows by 2 mm every million years, how long will it take a nodule…

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