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Subject :NSO    Class : Class 4

The given graph shows different levels of oxygen in the air at different times in a park. Which point (W, X, Y or Z) on the graph, shows the level of oxygen in the air at night?


A W
B X
C Y
D Z


if CO2 is released at night then the O2 level should be more

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
Answer is C because the graph is showing different levels of O2 in the atmosphere and Y has less oxygen in the atmosphere.

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