Explanation:
Cahokia was the largest and most influential urban settlement of the Mississippian culture, which developed advanced societies across much of what is now the Central and the Southeastern United States, beginning more than 1,000 years before European contact.
In the beginnings of human settlements, when the Agricultural Revolution had happened and people needed to grow food to survive, the most fundamental feature of the soil was its fertility.
And so it happens that soil is much more fertile and easy to grow food on if there are floods or at least water nearby.
The first map shows the localization of the Indus Valley civilization (3300 - 1300 BCE) and the second is where the Yellow River civilization (3500 BCE-?) was born.
These civilizations were formed in these territories due to the presence of water: in the Indus Valley there were periodical floods that helped grow food, and in the Yellow River basin it was possible to build an irrigation system that sustained people around it.
Answer:
Jackson's Presidency Which of the following were new inventions or developments that contributed to the nation's economic expansion in the early..
Explanation:
Alexander Graham Bell’s big breakthrough came on 10 March 1876 when he used what he called a ‘liquid transmitter’. This was a vertical metal cone with a piece of parchment stretched like a drum over its narrow end at the base. On the outside of the parchment, Bell had glued a cork with a needle stuck in it, pointing into a tiny cup of diluted sulphuric acid.
When he shouted into the open end of the cone, his voice made the parchment vibrate, so the needle moved slightly in relation to a contact in the cup. The needle was wired to a battery and the movement varied the strength of the current passing between the contacts, thus converting sound waves into an electric signal which travelled along a wire to a receiver. While setting up the experiment, Bell spilt some acid on his trousers. Shouting to his assistant, Thomas Watson heard the message on the receiver in another room and rushed through to Bell, who had just made the first phone call.
