Question

some important questions of class 9th chemistry
chapter 1 matter in our surrounding
chapter 5 Biology the fundamental unit of life
chapter 12 sound

Answer 1

the matter in our surrounding
1. what is matter
2. what is kinetic energy
3. difference between evaporation and vaporisation
4. characteristics of matter
5. different states of matter

the fundamental unit of life
1. who discovered cell
2. what is cell theory
3. what is cell membrane made up of
4. what are chromosome
5. different parts of cell
6. why cell is called the structural and functional unit of life