Sound is an energy
Sound propagate(means aage badna) in wave form
Wave form means aapne kabhi patther fenka hai taalaab main
After throwing stones you can see circular wave
When you want to walk you need a medium which is called land
In such a way to propagate sound they need air , water and land which is called medium
Islia moon per air no hone ki wajah se we are not be able to heard sound on moon
BUDDHA institute is teaching following classes
I think there is no impact of you switch to CBSE,as medical includes biology as major portion and level of BIOLOGY IN ICSE is deep as in CBSE so if marks does not matter to you then you may switch but yes you might continue only ICSE biology so that your concepts remains great.
Science Made Easy is teaching following classes
One of the most interesting part of mathematics is geometry.just correlate the structure of shape with each other you will get easier trick to know the formula how they are coming from..after understanding the formula your menstruation al section will become automatically strong