Select the correct answer. which sentence is a scientific statement? a. there is a substance around us that cannot be detected. b. kids should go to school for 12 years. c. experimentation is the best way to obtain knowledge. d. unicorns once existed on earth. e. there are no living things on the moon.\

Experimentation is the best way to obtain knowledge, because it is the only actual factual thing in the options

The correct answer is option E, that is, there are no living things on the moon.  

Scientific knowledge is created via experimentation and methodical observation on measurable objective variables. Scientific knowledge is supported on evidence. The statement, that is, there are no living things on the moon, is a fact based on various scientific evidence. It is not based on personal beliefs, however, in direct observation of proof. Thus, it is the true sentence regarding a scientific statement.  

The other statements exhibit no supporting evidence, thus, one cannot consider them as scientific.  

i'm pretty sure its b i might be wrong though!

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.