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Answer. Pure substances and mixtures 02
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Are ice and water different substances?
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Answer. Measuring 1.2
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Measure the sides of your table by the length of your hand. Then take a tape measure and measure them again. Which of the two measurements is more accurate? Why?
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Final self-evaluation 10 - The Universe and our Solar System
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Are the following sentences true or false? A medium-sized star ends its life cycle as a black dwarf. Large, dense stars end their life cycles as white dwarfs. Large, dense stars explode and become…
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Final evaluation 10 - The Earth and the Moon
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Calculate the speed at which the Moon moves around the Earth; take into account the following facts: circular orbit, average distance of the Moon from the Earth is 385000 km, period of rotation is 28…
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Answer. Parts of the atmosphere 2
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How do temperatures change in the troposhere? And the density of the air?
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Initial evaluation 3 - The Hydrosphere
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Do the following contain fresh water or salt water? river lake sea glacier
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Answer. The hydroshpere 3
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Is all the available water suitable for consumption?
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Answer. Drinking water 3
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Is the water that leaves sewage treatmeant plants suitable for human consumption?
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Reflect. Waste water 3
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- 1477 visitas
Is the water that leaves water purification plants suitable for human consumption?
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Reflect. Properties of minerals 3.1
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If we have two white minerals, one quartz and one calcite, how can we use hydrochloric acid to tell them apart?