In order to describe the velocity of an object, which three pieces of data are needed? question 4 options: the mass of the object in grams the speed at which the object traveled the pull of gravity on the object the distance traveled by the object the time taken to travel the direction of travel the mass of the object in grams the time taken to travel the acceleration of the object object the distance traveled by the object the force the object had on another object the mass of the object in grams

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.