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Scienze

Scienze. Due esempi di brevi moduli inseriti nel curricolo. Sicurezza in laboratorio. Becco Bunsen. Sicurezza in laboratorio. Prima lezione (1h). L’insegnante e l’assistente di laboratorio preparano i tavoli con gli oggetti necessari

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Scienze

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  1. Scienze Due esempi di brevi moduli inseriti nel curricolo Sicurezza in laboratorio Becco Bunsen

  2. Sicurezza in laboratorio Prima lezione (1h) • L’insegnante e l’assistente di laboratorio preparano i tavoli con gli oggetti necessari • Quando gli studenti entrano si siedono ai tavoli e osservano le attrezzature del laboratorio, gli armadi e il loro contenuto • Insegnante e studenti parlano dei possibili pericoli e delle precauzioni da prendere • Controllano dove sono gli estintori e l’allarme • Gli studenti controllano se tutti gli oggetti elencati nel loro libro di testo sono presenti, viene data una listacon una breve descrizione • Gli studenti identificano gli oggetti • L’insegnante fa vedere flaconi di varie sostanze e fa notare i simboli

  3. Sicurezza in laboratorio Seconda lezione (1h) • Gli studenti si dividono in gruppi • L’insegnante consegna loro dei fogli con la descrizione delle norme di comportamento nel laboratorio (foglio 1) (foglio 2) • Vengono assegnati i compiti, gli studenti devono preparare dei poster da mettere in laboratorio • Alla fine dell’ora l’insegnante raccoglie i lavori

  4. Sicurezza in laboratorio Terza lezione (1h / 2h) Gli studenti preparano una presentazione in powerpoint

  5. Guidelines for a Safe Lab Plant SafetyUse caution when handling plants. Do not eat or taste any unfamiliar plant or plant parts. If you are allergic to pollen, do not work with plant or plant parts without a gauze face mask.   Glassware SafetyCheck for broken, cracked, or chipped glassware. It should be disposed of properly. Do not force glass tubing into rubber stoppers. Clean and air dry all glassware.    Eye SafetyWear your laboratory safety glasses at all times. Know how to use the emergency eyewash system. If chemicals get into your eyes, flush them out with plenty of water and inform your teacher.   Heating SafetyTurn off heat sources when they are not in use. Point test tubes away from yourself and others when heating substances in them. Use the proper procedures when lighting a Bunsen burner. To avoid burns, do not handle heated glassware or materials directly. Use tongs, test-tube holders, or heat resistant gloves.   Electrical SafetyUse care when using electrical equipment. Check all electrical equipment for worn cords or loose plugs before using them. Keep your work area dry. Do not overload electrical circuits.   Clothing ProtectionWear your laboratory coat or apron. It will help protect your clothing from stains or damage. PoisonDo not mix any chemicals unless directed to do so in a procedure or by your teacher. Inform your teacher immediately if you spill chemicals or get any on your skin or in your eyes. Never taste any chemicals or substances unless directed to do so by your teacher. Keep your hands away from your face when working with chemicals.   Animal SafetyHandle live animals with care. If you are bitten or scratched by an animal, inform your teacher. Do not bring wild animals into the classroom. Do not cause pain, discomfort, or injury to an animal. Be sure any animals kept for observations are given the proper food, water, and living space. Wear gloves when handling live animals. Always wash your hands after handling any animal.   Fire SafetyTie back long hair and secure loose clothing when working near an open flame.  Do not reach across an open flame. Know the location and proper use of fire blankets and extinguishers.  

  6. Safety in the science laboratory Group 1 – Create a lab safety poster illustrating major safety rules. Group 2 – Create a lab safety PowerPoint presentation (10 slides minimum) Group 3 – Create a lab safety poster for chemicals Group 4 – Create a lab safety poster for Glassware Group 5 – Create a lab safety poster for the use of the Bunsen burner Useful sites http://siri.org/graphics/Labs/ You can find drawings here http://siri.org/graphics/Labs/ Safety signs http://www.ualberta.ca/%7Ennocente/bioapt/resources/lab/index.htm Safety rules http://www.2learn.ca/search/response3.asp Search engine

  7. Becco Bunsen • Gli alunni osservano l’insegnante e l’assistente che fanno vedere il becco Bunsen e ne spiegano il funzionamento • L’insegnante consegna delle fotocopie con la descrizione e le norme per l’uso • Agli studenti viene data una fotocopia con il compito assegnato

  8. VERIFICA • Test finale formato da tre parti: • Reading (esercizi sulla comprensione del testo) • Safety rules quiz • Bunsen Burner

  9. SITI http://www.scienceaware.com/default.htm http://ch185.semo.edu/labsafe/labsafety.html http://www.ashfieldgirls.org/science/bunsen_burner.htm http://www.creative-chemistry.org.uk/activities/flametests.htm

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