The scientific study of any aspect of the world uses the scientific method to acquire knowledge. To apply the scientific method, a researcher with a question about how or why something happens will propose a tentative explanation, called a , to explain the phenomenon. For a scientific explanation to be testable, it must also be . Char heard from her friends that marijuana use can cure glaucoma so it should be legal in all 50 states. Char knows that she is biased in favor of marijuana legalization, so she decides to exercise some skepticism about this claim. She researches where her friends got their information, how reliable it is, and what other sources say about legalizing marijuana. Char is . Wilhelm Wundt used (he called it "internal perception"), a process by which someone examines their own conscious experience as objectively as possible, making the human mind like any other aspect of nature that a scientist observed.

Hypothesis

perceivable and measurable

Thinking critically

Introspection

Explanation:

A hypothesis acts as the premise or basis of experiment

It is like a guess that should return be proven right or wrong by the experiment

A scientific test must be perceivable and measurable such that it should be something that is tangible and can be measured such that it can be proven

Char is thinking critically by analysing facts to form judgement

Wilhelm is known as the father of experimental psychology and believed instrospection could be applied to reveal one's consciousness

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.