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![Page 1: experiências](https://reader035.fdocuments.net/reader035/viewer/2022070502/568c361a1a28ab023596caaf/html5/thumbnails/1.jpg)
ExperiênciasFlutuação
eDissolução
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No dia 23 de Fevereiro realizámos experiências com a ajuda da Carla e da nossa professora.Gostámos muito.
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Flutuação
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Será que uma batata flutua?
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Será que uma maçã flutua?
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Será que a rolha de cortiça flutua?
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Será que a placa de madeira flutua?
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Será que um balão flutua?
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Será que um ovo flutua?
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Sim, o ovo flutua. Foi adicionado à água sal e assim ele não vai ao fundo.Alguns objectos que não flutuam na água doce flutuam na água salgada, desde que se junte sal suficiente. Assim estamos a alterar a densidade da água e o ovo pode flutuar.
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Dissolução
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Começámos a experiência da dissolução com um rebuçado…
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Será que o sal se dissolve na água?
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O sal e o açúcar dissolvem-se, quer dizer, as suas partículas ficam cada vez mais pequenas e espalham-se completamente na água deixando de se ver.
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Será que a areia se dissolve na água?
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Há materiais, como a areia, que não se dissolvem na água, chamam-se insolúveis.