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ACTIVITY The questions below refer to the facts of everyday life, some well known to us. Surely you have watched. Based on your knowledge to answer: Why do we feel thirsty when we eat salty meat? The green corn boiled in water with salt is, in physical appearance, other than sweet corn cooked in unsalted water. Why? The transport of the root sap of plants is only possible if there is difference in concentrations between the means which are dissolved substances necessary for the nutrition of the plant. What explains this phenomenon? The animal cell filtration of blood occurs by osmosis kidney is? A freshwater fish can be placed in salt water? What is the soil water up by plant roots? Why stay with the fingertips wrinkled after a long time in sea water, a pool or a bath? DEBATE The meat when exposed to sun and wind, covered with salt, dehydrated, and so can be conserved. Do a literature search on the "jerky" explaining this conservation process characteristic of northeastern Brazil. You may have heard of a "child's play" which consists in throwing salt on slugs to see them "melt". What means then this "melt"? Precisely the mechanism of osmosis. This mechanism happens and we can see it perfectly if we do this joke. But you think correct verify this mechanism in this way? Think a little! Today environmental laws are more elaborate, so be careful. If it were that simple, this method throw salt on animals to eliminate them, could be used as a way to control environmental imbalance in an invasion of slugs or snails, invertebrate animals belonging to the Phylum Mollusca, Class Gastropoda. DEBATE The invasion of snails in Brazilian cities have been a serious problem since the 1980s, as these invertebrates can transmit disease and cause environmental imbalance, and other disorders. Look for articles in newspapers and magazines that report these intrusions to discuss this matter. Discuss with your classmates and your teacher about the causes and consequences of the proliferation of this snail, and control methods in these cases.
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AKTIVNOST Pitanja u nastavku odnose se na činjenice iz svakodnevnog života, neke dobro nam poznati. Sigurno ste gledali. Na temelju vašeg znanja odgovoriti: Zašto smo osjećate žeđ kada jedemo meso slano? zeleni kukuruz kuhan u vodi sa solju, u fizičkom izgledu, osim slatkog kukuruza kuha u vodi neslan. Zašto? prijevoz soka korijena biljaka je moguće samo ako postoji razlika u koncentracijama između sredstava koja su otopljene tvari potrebne za ishranu biljke. Što objašnjava ovaj fenomen? životinjska filtriranje stanica krvi javlja osmozom bubreg? slatkovodne ribe mogu biti smješteni u slanoj vodi? Što je voda u tlu koje se korijenjem biljaka? Zašto ostati s prstiju naborani nakon dugo vremena u morskom vodom, bazen ili kupka? DEBATA Meso kada je izložena suncu i vjetru, prekriven solju, dehidrirana, pa može biti sačuvano. Da li literature potrazi na "grčevit" objašnjavajući to svojstvo procesu konzervacije u sjeveroistočnom Brazilu. Možda ste čuli za "dječja igra" koja se sastoji u bacanju soli na puževa da ih vidim "topi". Što znači da onda taj "istopiti"? Upravo mehanizam osmoze. Ovaj mehanizam se događa i možemo ga vidjeti savršeno, ako radimo ovaj vic. No, mislite točne potvrdili taj mehanizam na taj način? Razmislite malo! Danas okolišnih zakona koji više razraditi, pa budite oprezni. Ako je to bilo tako jednostavno, ova metoda baciti sol na životinjama kako bi ih uklonili, može se koristiti kao način za kontrolu ekološke neravnoteže u najezde puževa ili puževi, beskralješnjaka životinja koje pripadaju u koljeno Mollusca, Klasa Gastropoda. DEBATA Invazija puževa u brazilskim gradovima bili ozbiljan problem od 1980, kao što su ovi beskralješnjaka mogu prenijeti bolest i uzrokovati neravnotežu okoliša, i druge bolesti. Potražite članke u novinama i časopisima koji prijavljuju ove upada kako bi razgovarali o ovom problemu. Razgovarajte sa svojim kolegama i vaš učitelj o uzrocima i posljedicama širenja ovog puža, i metode upravljanja u tim slučajevima.