1. Proton is a i. positively charged particle
ii. negatively charged particle
iii. neutral particle
iv. all of these.
2.Write any 3 differences between noise and music.
3.Does pure water conduct electricity? If not, what can we do to make it
conducting?

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.