The basic principle of filtration, evaporation, distillation, sublimation, separating funnel, centrifugation?
My teacher have asked me to write the principles of the above mentioned separating techniques and also of chromatography, fractional distillation and crystallisation. She said us to write the purpose EACH of these techniques in 2-4 lines. I am of class 9. I know the answers but I dont know how to put them in words. Please help me.