(b) Suggest why passing water through the filter is an important step in the home water filtration system

Can someone me with questions 12 and 13 plz.

1. list three scientific reasons cockroaches may fly.

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.