BBC Compacta Class 9 Solutions - Classroom Assignment- 7

1.

Ans: (a)The TPR peaked on 9th May 2021. (Incorrect because the graph shows the peak was on May 8, 2021.)

2.
Ans: (d) The time when the curve of the positive cases and cured cases is likely to be flattened. (The opening line refers to the state-wise data on testing and positivity rates, indicating that the situation is not uniform across the states.)

3.
Ans:  (c) A few weeks before May, India topped the world in daily case load of COVID-19 infections. (This is correct as the paragraph indicates that before the sudden bump in cases, India was leading the world in daily case load.)

4.
Ans: (d) decline

5.
Ans: Lowering the number of Covid-19 tests can lead to an artificial peaking and can make it seem as if the number of positive cases is decreasing when in reality the virus might still be spreading widely.

6.
Ans: (d) The positivity rate went down in at least four major states.

7.
Ans: increasing testing to detect more infections while managing a decreasing positivity rate.

8.
Ans: Punjab, Odisha, Tamil Nadu, Kerala, and Himachal Pradesh are not following an optimal testing strategy because they still need to augment testing to capture more infections.

9.
Ans: These states have increased positivity rates which could indicate under-testing and potentially a higher number of undetected cases.

10.
Ans: PURPOSE: To find out if the decrease in the number of Covid-19 infections is authentic or not.
STRATEGY TO ACHIEVE IT: Increase testing and track positivity rates to ensure that the trend reflects a true decline in cases rather than a decrease due to less testing.

11. 
Ans: (d) 1-B, 2-F, 3-E, 4-A, and 5-C

12.
Ans: they both have peaks and troughs, indicating the rise and fall of cases similar to the rise and fall of the sea level.

13.
Ans: (d) Data related to COVID-19 may have been deliberately manipulated in many cases. (This takeaway is inferred from the discussions about the potential under-reporting of cases and deaths, as well as the artificial lowering of test numbers in some states to show a decline in cases.)