the filament in an electric light bulb is made from {Ans: tungsten}To test the effectiveness of plant fertilizer, groups of plants are grown with different types of fertilizer. A control group of plants would A. not be given any fertilizer B. be grown with a mixture of all fertilizers C. not be needed unless the results were unclear D. be grown in a different location from the other groups {Ans: A. not be given any fertilizer}the chemical formula of a compound describes the elements the compound contains and the ?? {Ans: ratio of elements in compounds}what is the symbol for hydrox ion {Ans: OH-}Regeneration in man is limited to A. reproduction B. fertilization C. experimentation D. healing of wounds {Ans: D. healing of wounds}When scientists measure a liquid's resistance to flow, they are measuring he liquid's A. density B. solubility C. viscosity D. permeability {Ans: C. viscosity}which of the following is an renewable resources {Ans: natural gas}a perpetual motion machine can never be built because it's not possible to eliminate?? {Ans: elasticity}Using the list, which of the following presents the stages of the water cycle in the correct order? 1. water vapor