Karel Černý je majitelem lékárny. Kromě jiného prodává také peroxid vodíku jako desinfekci. Prodávaný roztok by měl mít koncentraci 3 %, ale Karel si není jist, zda ho jeho dodavatel nepodvádí a v honbě za ziskem mu nedodává...
Comblab project finished in December 2014. In this website you can download Comblab teaching materials ready to be used in several languages. Currently most Comblab partners go on working with MBL for secondary science.
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MBL Materials
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The wine is a product that consists of several components, most of which is water (91 %). Besides water, ethanol (9-14 %), residual sugar, dyes and tannins, there are present also acids. There are more acids, but the most...
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Určite ste v lete mnohokrát išli okolo vodných zdrojov, alebo ste v ich blízkosti trávili prázdniny. Rieky, rybníky, potoky alebo jazerá sú príjemným miestom na oddych a rekreáciu.
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Com es pot fer variar l'activitat cardiaca?
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Sůl je v zimě používána jako pomoc při odstraňování sněhu a ledu ze silnic, tratí a ulic. A to proto, že sůl podporuje tání sněhu a ledu i při teplotách pod nula stupňů. Proč se led a sníh rozpouští při kontaktu se solí...
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Saps què és?
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Imagine, you are walking in the summer in the country with lots of water sources, rivers, lakes, ponds and rivulets. You may remember that the water did not look the same.
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Exploring eutrophication using turbidimetry.
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In this activity, we try to explore an impact of Eutrophication. We will study the factors which can influence the Eutrophication.
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