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The depletion of the ozone layer
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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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Answer. The hydroshpere 4
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Why is the amount of drinking water available on the planet increasingly scarce?
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Final evaluation 8 - The Hydrosphere
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What is the difference between a water purification plant and a sewage treatment plant?
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Calculate. Minerals (2)
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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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Final self-evaluation 05 - The Earth, a Living Planet
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Are the following sentences true or false? Biomolecules are mostly made up of metallic elements. Proteins are used by the body to repair tissue. Nucleic acids are necessary for reproduction.…
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Did you know?
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- 1778 visitas
Yeasts are microscopic fungi that reproduce by budding. In this process, a protuberance (or bud) forms, which may separate from or remain attached to the parent organism. Yeasts are of great economic…
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Final evaluation 10 - The Plant Kingdom
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Use the following phrases to explain the difference between monocotyledon angiosperms and dicotyledon angiosperms: seed with a cotyledon – flower with 3 petals or multiples of 3 – leaves with…
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Answer. Lanscapes of the Earth's climate zones 05
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Describe the two types of cold climate landscapes on Earth. In which landscape is life easier?
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Answer. Spain's landscapes 03
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How does latitude cause a variation in temperature between the north and the south of the Peninsula?
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Remember. Supranational organisations 02
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What do you think is the United Nations' most important role? Do you know about a conflict in which the UN intervened?
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