Answer:
color change, formation of a precipitate, formation of a gas, odor change, temperature change
Romanian i think that is what youre asking ??
Russian society is a bit more mature I guess or formal and they take care of many things such as friendship, and when they meet someone new they believe they are a stranger and do not feel safe. On the other hand in the Us society it is very happy and joyful where you have usual discussions, debates, conversations with friends, family and random people some times so that is what the difference is between the two.
