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Answer. The origin of materials
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Complete the following sentence: Materials that are not found in nature are called materials.
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Choose. Magnitudes and units
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Match each unit of measurement with a concept: metre mass time length kilogram temperature
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Answer. Density 5.5
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What procedures should we follow to measure the density of a solid?
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Answer. Density 01
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Define the concept of density and name the units of measurement used to express it.
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Final evaluation 4 - Matter: Mass, Volume and Density
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Describe how weighing scales work.
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Answer. The Earth, a planet of the Solar System 02
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In which direction does the Earth turn on its axis?
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Answer. Air pollution 1
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Give some examples of activities that cause air pollution.
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Answer. Atmosphere and weather 4
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Which meteorological instruments are used to measure wind speed and wind direction?
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Final self-evaluation 2 - The Atmosphere
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Are the following sentences true or false? The atmosphere is 1024 km thick. Oxygen makes up 21% of the atmosphere. The exosphere reaches areas of the atmosphere where there is no air. The ionoshphere is…
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Final self-evaluation 10 - The Atmosphere
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Complete the following sentences with the missing words: Carbon dioxide provokes an increase in the greenhouse effect. Acid harms lakes, rivers, forests and buildings. Atmospheric pressure is measured…
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