Сборник задач по подготовке учащихся к международным исследованиям timss и pisa
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Тимс,Пизаға дайындық
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- Task 16. Oil
| Task 15. Scales
The weight of the substances A and B was measured in the balance, as shown in Figure 5a. Substance B was placed in a container with substance A, whereby the substance C was formed. empty container, which included the substance B, was placed back on the scale, as shown in Figure 5b Figure 5 а Figure 5b Scales on the figure 5a showed the weight 110 g Question. What weight will the scales in Figure 5b show? A. More than 110 g C. 110 g C. less than 110 g 134 Explain your choice. Task 16. Oil Oil refers to the non-renewable natural resources. Question. Which of these natural resources is also a non-renewable? A. Wood. В. Sea water. S. Sunshine. D. Coal. Task 17. Figure 6 shows the experimental results of stress measurements on the conductor at the ends at different values of the current intencity in it. Figure 6 Question. What is the electrical resistance of a conductor when the current intencity of 1.5 A? A. 4 Ohm B 2 Ohm C 0.75 Ohm D 0,25 Ohm Task 18 To determine the weight of the body by using wrong lever scales the following method can be used. In one of the cups some weight is put(it shoud be heavier than the body). It is necessary to counterbalance with weights on other cup. After that, put on a cup of weights the body and remove as much weights, as needed, to restore balance. Question. What is the weight of the body? A Mass of the cargo. B. Mass remained on the cup weights. C. Mass removed from the cup weights. Task 19. Distribute correctly levels in three main spheres of objective reality ( "from the simple to the complex"), using the table 5. |