13. Igneous rocks do not contain rounded particles. They are made of 14. Do igneous rocks usually show layering?
15. What is the fine grained rock similar in composition to gabbro?
16. What's the difference between granite and rhyolite?

I'm not sure but i will try to find out

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

A, it is falling action my have a good day