The ceiling fan direction in winter should be rotating clockwise or reverse. Warm air rises and gets trapped near the ceiling so when the ceiling fan direction is in reverse mode it circulates the warm air from the ceiling to the floor helping take the chill out of the air.
A reactant is a substance that is being used up or consumed in a chemical reaction. It is needed in large amount as compaed to reagent. A reagent is something which is used to initiate a reaction and aids to carry out it and it is also consumed in a reaction, unlikely to catalysts which are not consumed in a reaction.
A: The word decant means to pour or otherwise extract only liquid from a container that holds both liquid and solid particles. In chemistry, this term is often used in experiment instructions. Though the word has applications in other areas (as wine connoisseurs will gladly tell you), in chemistry, decanting is the act of removing liquid from a container that contains both liquid and solid particles.