1. prototype   primary type used as model.   substance which provides nourishment.   lowest point in wave; shallow receptacle.   pattern with balance or harmony.   Hint Half-n-half Clue   2. trough   breathing.   lowest point in wave; shallow receptacle.   optical illusion due to atmospheric conditions.   outer boundary for closed figure.   Half-n-half Clue   3. quagmire   combining elements to produce whole system.   marsh or soft and wet land.   coloring agent.   terms used in a science or discipline.   Half-n-half Clue   4. virus   band of colors formed when light passes though a prism.   poisonous element that communicates infection.   harmless substance given as dummy medicine.   change of form, character or circumstances.   Half-n-half Clue   5. indices   green coating on old bronze.   pointers or indications.   substance that helps propel or push forward.   size or extent.   Half-n-half Clue   6. precipitant   substance that helps propel or push forward.   substance that causes solid matter in solution to deposit.   reasoning with major premise, minor premise and conclusion.   band of colors formed when light passes though a prism.   Half-n-half Clue   7. spatula   array of numbers or symbols; mold or die.   amount produced or income earned.   natural environment; nutrient setting for microorganism.   tool with edgeless blade for mixing and spreading.   Half-n-half Clue