Сборник задач по подготовке учащихся к международным исследованиям timss и pisa
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Тимс,Пизаға дайындық
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Wood The tree (lat árbor.) is a vital form of woody plants with a single, clearly marked, perennial, in different stages of woody, remaining throughout the life, branched by (except trees)the main axis-trunk. Figure 9 Question 1. How to determine the age of a coniferous tree, if the tree trunk is across? A. Concentric circles B. Color crust C. For trunk thickness D. Height of the tree Answer: ______________. Question 2. Show the three main parts of the tree A. Root, stem, crown Figure 10 B. Pith, cambium, shtamb S. Crown, bole, core D. Root, trunk, bole Answer: ______________. Tasks 6. The problem of the Aral Sea One of the consequences of anthropogenic human activity is the Aral Sea problem. The ecological situation caused considerable damage to the Aral region population are affected. Mainly children as well as residents of villages and towns in the region. The region has the highest mortality rate of children and mothers. The 154 number of both infectious and parasitic, psychosomatic diseases increase. Medical experts have associated them with the sea desiccation. Question 1. What are the prospects or event could prevent the drying of the Aral Sea? Answer: ______________. Question 2. Formulate a question related to the improvement of the environmental problems that can be scientifically studied. Answer: ______________. Task 7. The Island "Barsakelmes". Based on the information about the island "Barsakelmes" give one reasonable explanation for reducing the number of wild coulombs in the given period (from 70 to 20 years ago). Answer: ______________. Question 2. Table 1 shows the total number of the travailled and surviving young coulombs in the island "Barsakelmes" for two consecutive years. Table 1. 2000 year 2001 year Births of young coulombs 355 450 The number of surviving of juveniles kulan 120 170 Theperson, who saw this table, said that it shows that the number of wild coulombs is constantly growing. Is there enough data in the table to make such a conclusion? Explain your answer. Answer: ______________. Task 8. Windmills Structures on the Figure 11 are windmills with blades which rotate due to the wind. These rotations generators produce electricity. The stronger the wind, the blades rotate faster windmills and so produces more electric power. Figure 11 155 But in fact, between the wind speed and the generated electricity is no direct connection. Below it can be seen four conditions under which the energy is actually produced by the wind. - The blades start rotating when the wind speed is equal to V1. - for safety reasons, the rotation speed of the blades will not increase when the wind speed becomes greater than V2. - When the wind speed is equal to V2 , electric power is maximized. - The blades stop rotating when the wind speed is equal to V3. Question. Which of the graphs in Figure 12 shows better the relationship between wind speed and electric power generated under these working conditions? Answer : ______________. жүктеу/скачать 3,47 Mb. Достарыңызбен бөлісу:
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