I think the independent variable is the temperature, while the dependent variable is the size of the balloon. The factor that is held constant is the amount of air in the balloon. An identical balloon kept at the original temperature. Independent variable in an experiment is the variable that the experiment plans to change while the dependent variable is the variable whose value depends on the independent variable.
Indeed the answer is C but let me explain why: <span>A weather map is a graphical model that displays the distribution of one or more weather element. That is why the answer is C. Model. I hope this has giving you a clarification</span>
Digesting a sandwich
because your stomach acids break down the food so it can be digested and what not
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
