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 4
Option c
Ans 2:
Class : Class 7
Ans 3:
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.