Answer:
A. Bubbles formed
Explanation:
When a student added a piece of limestone to a solution of hydrochloric acid, bubbles are formed.
The bubbles are as a result of the CO2 gas that is formed.
Below is the reaction:
CaCO3+2HCl → CO2+H2O + Ca++ + 2Cl-
From the left hand side, we can see that the reaction is with limestone and hydrochloric acid. Their reaction forms carbon dioxide gas (CO2), water (H2O), dissolved calcium (Ca++) and dissolved chlorine (Cl-) on the right hand side.
With due observation, bubbles will be seen evolving from the reaction. These bubbles formed is the carbon dioxide gas which reveals that a reaction is taking place.
Alex Haley's Roots: The Saga of an American Family encouraged black Americans to explore their past and helped to popularize oral history and family history in the United States. His writing reminds us that oral history recording taps into a vast, rich reservoir of oral traditions sustained through family, community and national memories.As a boy, Alex Haley spent his summers on his grandmother's front porch in Henning, Tennessee. listening to her and her sisters tell stories of the family's history back through the days of slavery. The "Furthest–Back person" they spoke of was an ancestor they called "the African," who was kidnapped in his native country, shipped to Annapolis, Maryland, and sold into slavery. He remembered hearing:"Yeah, boy, that African say his name was 'Kin-tay'; he say the banjo was 'ko,' an' the river 'Kamby-Bolong,' an' he was off choppin' some wood to make his drum when they grabbed 'im!"These stories stayed with young Alex throughout his life. And he became obsessed with finding his family's roots in Africa.With the help of some friends and a linguist from West Africa, he learned that some of the words in his grandmother's stories were like Mandinka words (a language spoken by some tribes), and that the river she spoke of as 'Kamby Bolong' was probably the Gambia River. Alex knew that he must get to the Gambia River.With the help of Gambian officials, he learned that a griot, or oral historian, knew the history of a Kin-tay family. Could this be his own family? Alex Haley began his own trip up the Gambia River to find out.
Answer: Usually when you research, your teacher may ask what the URL ends with. If it ends in .com, it could potentially be a hazard due to the fact that anyone can make a .com website. But if you can back it up with facts and proof, it should be fine. On a research website, most people look for .org or .gov because those are official sites made by trusted people. Also, its nice to know so you can cite your sources.
Answer:
I haven't read the book yet, but if I did it would be B
