Answer:
Yes; new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change
The main cause of high blood pressure is stress.
I think its the third one
Answer:
This is conflict perspective proposed by karl Marx.
Explanation:
The basic ideal is that a typical society is not a static one; but rather a dynamic entity which undergoes a constant change cause by class conflict.
This conflict theory X-rays social life as a system of competition, where members of the society must compete for limited available resources to be relevant in the society. Therefore the driving mechanisms for change in any society is conflict (as keen competition) for the limited resources,and this brings revolutionary social change in the society.
Thus in this present scenario, US schools,as a results of keen competition for the limited resources and the provision of rewards to emerged school and punishments to the victims of conflict brings a revolutionary change that constantly drives the academic social life of the school society.
