Week 3
Conclusion
It turned out that not all household chemicals are of good quality, as the ads show.
Each person is solely responsible for their own health. And not to harm the environment is also a human task. So let’s take care of ourselves and our surroundings!
The following are tips for using chemicals:
It is necessary to carefully read the instructions for the use of chemicals and strictly follow them. Chemicals should be used only in the amount specified in the instructions.
After using dishwashing liquid, rinse the dishes thoroughly with running water.
Wash your hands thoroughly after using chemicals and wear gloves if possible;
Avoid prolonged contact of chemicals with the skin of the hands;
Keep out of the reach of children;
All chemicals must be in appropriate, clearly labeled containers. Do not store unknown chemicals or expired items in the apartment. Products containing solid chemicals must be tightly sealed and labelled.
Devices that are dangerous for a fire situation should be in tightly closed containers, away from sources of heat and fire.
Ways to improve the environment in your home
| Environmental factor | Adverse consequences of the influence of the factor | Possible consequences of the influence of the replacement factor with harmless means and ways to remove the harmful influence |
| Synthetic fabrics and carpets (nylon, nylon, polyester, polyacrylonitrile, polyvinyl chloride polyolefin) | Irritation of the skin and the occurrence of allergies due to the release of volatile toxic products | |
| Cosmetics and perfumery:perfumepomadepowdercreams | Allergic reactions. Toxic effects of bismuth compounds and fats on stale lipstick. Toxic effects of zinc compounds. Conjunctivitis, dermatitis, lung lesions | |
| Shampoostoilet soapHair Dyehair spraynail polishbody deodorantair deodorant | The occurrence of allergies. Skin irritation, carcinogenic. Narcotic effects of acetone and other solvents on the circulatory, nervous and respiratory systems. Irritation of the mucous membrane, suffocation. Narcotic effect | |
| Detergents:washing powders | Allergies, catarrhal changes, irritations of the mucous membranes | |
| Cleaners:window cleaners;preparations for cleaning pipes;shoe cream and means to protect it from moisture | Allergies, catarrhal changes and irritations of the mucous membranes. When released into rivers and lakes – the destruction of living organisms. Narcotic effect, toxic effect of isopropanol. Alkali lesions of the mucous membranes and skin. Inflammation of the mucous membranes. | |
| Whitening and disinfectants | Irritation of the skin and mucous membranes, as well as the carcinogenic effects of formalin | |
| Pesticides | Toxic effect | |
| Construction and finishing materials; adhesives; oil paints; oil lacquers, parquet lacquer, enamels and nitro enamels Chipboards and fibreboards; Film materials for facing chipboard; Linoleum; Furniture fabric and curtains | Irritate the skin mucous membranes; “Moment”, “Phoenix” affect the nervous system, can cause cancer. Toxic effects of heavy metals and organic solvents. Exposure to toxic and carcinogenic substances. Fire hazardous; contain narcotic substances, affect the blood-forming organs. Emitted formaldehyde has mutagenic properties. They emit toxic formaldehyde and acrylic acid. Vinyl chloride lastifiers can cause chronic poisoning. Chemical fibers are electrified, poorly absorb moisture, contain toxic impurities | |
| Packaging: metal | Environmental pollution, loss of expensive materials. | |
| Polyethylene, bacteria and polystyrene packaging, etc. Multilayer and multicomponent packaging | Not decomposed by bacteria and do not dissolve; when heated, they decompose to form toxic compounds. Not recyclable, pollute the environment |
Presentation of projects (presentation)
This week, students should submit their completed projects on the following items:
Household chemicals:
studying household chemistry, the group demonstrates knowledge and skills in the field of chemistry, biology and physics;
analyzes the composition;
the effect of dishwashing liquid on the body and the environment;
the effect of washing powder on the body and the environment;
statistical data (survey) is illustrated in the form of diagrams (graphs).
Assessment
PBL evaluation criteria:
Problem based learning (problem-oriented learning) is a learning method in which students acquire knowledge and skills by working on one project for 3 or 4 weeks to research and find an answer to a genuine, interesting and complex question, problem or challenge (then follow the PBL Rubrics link to the Rubrics).
