Which sentence is a scientific statemwhich 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. ent?

option E. There are no living things on the Moon.

Justification:

Scientific knowledge is established through methodical observation and experimentation on measurable objective variables. Scientific knowledge has evolved thanks to curiousity, creativity and skeptical attitude of the human being avid to understand the phenomena that surround him (the world and the universe). Scientific knowlege is supported on evidences.

Let's examine each statement:

A. There is a substance around us that cannot be detected.

False. A scientific statement about a substance around us would be aimed to describe that substance in objective (measurable) terms. This statement does not reveal a scientific knowledge.

B. Kids should go to school for 12 years.

False. This kind of statement is more based on cultural beliefs; not a scientific statement.

C. Experimentation is the best way to obtain knowledge.

False. There are different kind of knowledges. Unlike scientific knowledge, religious and phylosophycal knowledges are not reached through experimentation.

D. Unicorns once existed on Earth.

False. It is not based on scientific evidence, so it is not a scientific statement.

E. There are no living things on the Moon.

True. This is a fact established by multiple scientific evidence. It is not based on personal beliefs but in direct observation of evidence. So this is the true sentence about a scientific statement.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?