What is the best example of an experimental scientific investigation? a) feeling the texture of a rock b) placing a whole apple and apple slice in the sun and observing how many days it takes for the fruit to rot to determine if cut fruit breaks down faster than whole fruit c) asking what causes some people to have allergies d) recording the sound of glass breaking

Scientific investigation: The process in which scientist solve the question by using different systematic approach. It can be initiated in different ways.

Experimental Scientific investigation: The investigation in which scientist answer the question on the basis of experimental results. Experimental investigation includes both dependent and independent variables, and only one variable is tested at a time is possible.

The best example of an experimental scientific investigation is: when we placed a whole apple and apple slice under sun, and noted down how many days it will take to  rot in order to compare the break down of apple slice and whole apple.

Thus, option (B) is the correct answer.

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.