Answer:
the study of the structure, reaction, and composition of different kinds of substances
Explanation:

Answer:
yes
Explanation:
Shampoos contain ingredients known as surfactants which have the ability to dissolve dirt and oily substances. Once the surfactant dissolves the dirt and oil, it is then washed out hair leaving the hair clean and fresh.
The middle one is the answer
Answer:
<em><u>Not sharing water bottles </u></em>
Explanation:
Assuming what you mean by cold sores is herpes, it will defiantly be not sharing water bottles.
The barbara one because it deals with social health