Proposal: Through a simple experience will work with the smoke of snuff. The objective is to snuff components, visualizing macroscopically, ie an observation made sense: touch, smell and taste ...
Objective:
- know the components of snuff through technological expertise
Suggested Area : Understanding the natural environment in grade 8 and Environmental Biology at 2 °
Suggested Time Group: the group should learn to organize better.
Time:
- Session: 1 hour teaching session
- Second : 1 hour teaching
Material: Graphic
Annex: bottles of 2 liters, tape, cotton , a punch or a Phillips screwdriver, small glass containers or test tubes and of course, cigars snuff. Snuff annexes.
Introducing the activity:
- interior Day: On or the teacher can rely on transparency attached stating what the activity the next day, asking them to bring home a plastic 2 liter drink. Can be arranged individually or in groups of 2 or 4 students sharing a bottle. It is important that everyone take direct contact in the activity.
- for once without a precedent, the teacher will be or who provides the snuff.
Activity Development:
- Day 1, session : Condition the room or laboratory experiences, so that students can follow the explanations and the lecturer can focus on those groups that make them cost more than manual activity. It is mentioned that at the end of the activity, each student will collect the material useless and, who will be responsible for cleaning the workspace. To avoid possible accidents, or the teacher punching screw caps on each bottle, then handing them to students who follow the whole process of the attached form. It is important to adjust well cigar plug the hole, sealing with tape or a few drops of melted wax (in this case should do so on or the teacher) by removing pre-filter, adjusted debiéndose also placed the cotton swab. Before you close the screw cap, the bottle should be tightened so as to deform expelling as much air as possible. Once compressed cylinders will be firing smoke cigars each, in groups of three bottles to make it orderly. To be recovering his form, the bottle draws the smoke passes into the cotton being picked up the object of our activity substances (nicotine, tar ...). Can be stated as a game in which winner is remove the cotton more dense and full ...! . Each cotton is collected in a test tube with the names of the participants group.
- Possible disadvantages
- Despite the smoke, which is formed, the activity can be fun and acting for him or the teacher can observe the individual attitude of students regarding the snuff.
- Possible disadvantages
- 2 nd Day session: On or teacher provides students with the various cotton obtained in order to be observed throughout the course. Then he says the small group activity and becomes a sharing group, trying to provoke discussion about what lived, for example, reflect on:
- The social uses of snuff
- The decision of each person regarding the consumption of snuff
- Other possibilities: The different cottons obtained can be placed low to high color in the table of the classroom, with some imaginative label.
COPIED BY DIEGO GREZ
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