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Choose. The Earth's layers
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Match each characteristic with one of the Earth's layers: It is gaseous. It is made up of living things. It is made up of water. It surrounds the Earth. It is where the weather occurs. It covers…
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Answer. Moon, Earth and Sun 05
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Explain why there is a five-hour time difference between Europe and places on the Atlantic coast of the United States.
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Answer. Pollution, the environment and health 2
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Which communities of people are most at risk from the negative effects of air pollution?
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Answer. Meteorological maps 2
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What weather symbols are used on weather maps?
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Final evaluation 7 - The Atmosphere
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Choose the three magnitudes that most influence the weather: temperature air density cloud speed humidity atmospheric pressure demographic pressure Which of the above magnitudes also influence the…
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Answer. Water scarcity 2
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How many people on the planet do not have access to clean water? Can this situation be resolved?
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Final self-evaluation 10 - The Earth, a Living Planet
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Are the following sentences true or false? The first cells appeared before biomolecules. Water is the main component of living things. Biological evolution describes the development of individuals…
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Answer. Classification of living things 2.5
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What type of cells are bacteria made up of?
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Reflect. Bacteria 3.1
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Read the text about saprophyte bacteria and do the activity: Saprophytes: They live on decomposing organic material and transform it into inorganic material (mineral salts). Plants use this inorganic…
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Nematodes, annelids and molluscs
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2.1. Nematodes Nematodes are thin, round, non-segmented worms. There are a large variety of free-living land nematode species, although they prefer wet environments. Nematodes also include parasitic…