Travelling of ions from biology to physics

Damjan Štrus
[email protected]
Gimnazija Litija

Iztok Černe
[email protected]
Gimnazija Litija

Povzetek

V prispevku predstavljava način uporabe IKT pri medpredmetni povezavi med fiziko in biologijo, ki sva jo izpeljala v 3. letniku programa splošna gimnazija ob obravnavi električnega toka in njegovih učinkov (elektrolize) ter prenosa sporočil po živčnem sistemu.
Uporaba sodobne tehnologije (npr. IKT) pri pouku biologije in fizike je pomembna, saj ilustrira uporabo tehnologije v znanosti, hkrati pa pri dijakinjah in dijakih spodbuja razvijanje naravoslovne, digitalne in tehnološke pismenosti.
Za dijake sva pripravila aktivne oblike učnih ur, kjer sva bila le v vlogi usmerjevalcev. Delovanje živčevja temelji na posebnih lastnostih živčnega tkiva, ki ga sestavljajo specializirane živčne celice. Dijaki so uporabili različne spletne strani, s pomočjo katerih so raziskovali zgradbo živčnih celic. Na osnovi pridobljenega znanja so kasneje z animacijami spoznavali, da se sporočila po živčni celici prevajajo kot električne spremembe, z živčne celice na živčno celico pa v obliki kemijskih sporočil. Utrdili so razumevanje definicije električnega toka, eksperimentalno spoznavali delovanje elektrolize, merili pretočeni električni naboj, izračunali elektrokemijski ekvivalent za baker in vrednost primerjali s tabelarično.

Ključne besede: elektroliza, elektrokemijski ekvivalent, živčni impulz, sinapsa

Abstract

In our article we show a way to use ICT at cross-curricular activities between physics and biology, which we performed in 3rd grade of secondary school program with lessons about electric current with its effects (electrolysis) and transmission of massages through nervous system.
The use of modern technologies (such as ICT) at biology and physics lessons is important, because it illustrates the use of technology in science and at the same time stimulates science, digital and technological competencies of students.
We decided for active form of lessons, where teachers’ role is more similar to tutoring or mentoring. Activity of nervous system is based on special nature of nervous tissue which consists of special nerve cells. Students used various internet pages to research the structure of nerve cells, than they used newly gained knowledge through animations to learn that massages in the nerve cell are transmitted with electrical changes, but from one nerve cell to another as chemical massage. They revised the definition of electric current, experimentally researched electrolysis, measured flow of electrical charge, calculated electrochemical equivalent for copper and compared the calculation value with the one that can be found on tabular list.

Key words: electrolysis, electrochemical equivalent, nervous impulse, synapsis