Сборник задач по подготовке учащихся к международным исследованиям timss и pisa
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ПИЗА ДАЙЫНДЫ0 ТАПСЫРМАЛАРЫ қазақша
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- Task 10.
| Электроэнергия – Electric power
Скорость ветра – Wind speed Figure 12 Task 9. Antibiotics Many diseases can be cured with antibiotics. However, the positive effects of some antibiotics against puerperal fever has decreased in recent years. Question. What is the reason for this? After making antibiotics gradually lose their activity. Bacteria develop resistance to antibiotics. C These antibiotics only help against puerperal fever, but not against other diseases. D. The need for these antibiotics has decreased because in recent years have greatly improved conditions for the provision of medical care. Answer: . Task 10. Water Figure 13 below shows how the water, which is supplied to the urban house becomes potable. Figure 13 Water treatment is often carried out in several stages, including various methods of purification. The purification process shown in Figure 13, includes four steps (numbered 1-4). The second stage water is collected in the sump. Question 1. How is the water treatment at this stage? Bacteria in the water are killed. Water added oxygen. S. Gravel and sand settle at the bottom. D. Toxic substances are dissolved. Answer: . Question 2. Build the alternative option (circuit) water purification technology from the Caspian Sea, and convert it suitable for agricultural purposes, as well as for consumption and use in urban areas Answer: . Question 3. Factory Lead-nickel batteries produced wastewater discharges into a closed reservoir. What are the likely consequences of this act for the reservoir and the human inhabitants? Causes various diseases Yes / No Affects mental ability, causes aggressiveness Yes / No The following generations will affect all the consequences of anthropogenic pollution of water Yes / No Answer: _. Question 4. Calculate the amount of clean water that is spent aimlessly at the bad valve is closed for an hour per day, and if the glass (250 ml) filled in a minute Answer: _. Question 5. Daulet spilled water into sulfuric acid to dilute it and burned, why? Because sulfuric acid and water are the same density of matter Above the surface of sulfuric acid there is always a pair while connecting them with the reaction water is infused. Mixed with water in all proportions, and the small amount of heat, and the reaction takes place Sulfur allocates little energy Answer: . жүктеу/скачать 3,11 Mb. Достарыңызбен бөлісу:
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