Which is not model according to the scientific definition?

What is the average of mars in kelvin? What determines the color of salt solutions? How many times larger is the number of hydrogen atoms than oxygen atoms in a molecule of water Is the number the same for monosaccharides and for water? Why are people different colours? Lactic acid is poisonous what does this mean about how long muscles can use anaerobic respiration? How do you convert aniline into phenyl hydrazine? What is t called when two air masses of different densities collide? Changes in knowledge are going to occur? What substance would absorb the most heat energy with the least change in temperature water or copper? What is plant exudation? What happens when transform boundaries get stuck then unstuck? What does the word gently? What is the symbol if ions achieve a noble gas configuration? What are nerve cells found in the nose and throat? The process of putting specific policies into operation is called? Why is a shark tooth a non living thing? How do you prove that there is a prime between n and 2n? Are pygmy marmoset legal to have in TN? What is A dugeon with a opening at top called? What is the main form in which oxygen is transported in the blood?