9. A reading was taken on the Secchi Disk shown to the right. How deep is the light penetrating?
A) 0.6 m
B) 0.5 m
c)0.4m
D)0.2 m E) 30 cm
1 answer
B) 0.5 m
A) 0.6 m
B) 0.5 m
c)0.4m
D)0.2 m E) 30 cm
1 answer