The movement of rock pieces and other materials on earths surface is called

Which of the following best defines homeostasis? forming identical cells breaking down glucose maintaining stable internal conditions increasing an organism's temperature

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

Ok, so i have 2 questions. try to answer them both: (the topic is fire) 1) how can you represent the chemical reaction of fire? 2) what kind of bond is formed in this chemical reaction