Following strategy can be used to separate the mixture containing sand, pebbles, iron fillings , sugar , tooth picks and chalk powder.
Step 1: HAND PICKING: Herein, the pebbles and tooth picks can be separated by hand-picking method. Step 2: MAGNETIC SEPARATION: Herein, iron fillings are separated, as they are attracted towards magnet. Step 3: Dissolution and Filtration: Water is added to sand, sugar and chalk powder. Sugar will dissolved, but sand and chalk and sand are insoluble in water. Step 4: Sedimentation and Decantentation: Sand will settle down in water, hence, can be removed via sedimentation and decantentation. Step 5: Filtration: Chalk powder is insoluble in water, hence it can be removed by filtration method. Step 6: Crystallization: Sugar can be separated from solution by crystallization.
A & C. much debated nuclear power plants uses nuclear fission power stations, with uranium-235 as the source if fission. It is "non-renewable" according to the Energy Information Administration.
burning wood is also a non-renewable energy source
