Proposed Answers, I am sorry if I am wrong
1) Food is mixed and partially digested in stomach so its stomach
2) Mirage is due to the refraction of light
3) Water in its pure form is not a good conductor of electricity
4) Helium gas is used in party balloons
5) Bacteria are parastic organisms
6) Set of instuctions obeyed by the computer is a computer program
7) Carbon dioxide and Nitric oxide are exhaled by humans
8) Condensation
9) Oxygen