Capillarity in the stem
To show the rising of sap through the woody vessels.
Cosa imparano gli studenti
La scienza alla base di questo esperimento
The rising of sap through the stem, from the roots to the leaves, varies between species. In some plants such as celery this process occurs very quickly. In this experiment a coloured solution is seen rising through the woody vessels.
Attrezzatura utilizzata
- Portaprovette — 1680.06
- Provette — 1473,60
- 2 sticks of celery with leaves
Sostanze chimiche e reagenti
- Water
- Methyl blue dye — R:20/21/22
Note sulla sicurezza
Domande per gli studenti
- Observe what happens after different times. Try to give an explanation.
Cosa aspettarsi
<p>The water level drops in both test tubes.</p><p>At the same time the celery stick, in the test tube containing the methyl blue dye, shows a blue colouration along the stem. As time goes by the coloration rises up reaching the leaves, demonstrating how the lymph is taken from roots to the leaves through the woody vases.</p>
Smaltimento
Dispose of the liquid into the waste container.
Prova a fare questo esperimento in classe
Questo esperimento fa parte dell’ATP “ Mobile Lab ” — un laboratorio autonomo che trasforma una normale aula in un vero e proprio laboratorio scientifico, con oltre 200 esperimenti di fisica, chimica, biologia, robotica e ingegneria. “ Gali ”, il tutor basato sull’intelligenza artificiale integrato in ATP Connect, guida gli studenti in ogni fase e risponde alle loro domande direttamente al banco di lavoro.
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