First, boiling is the change of state from a liquid to a gas. Second, boiling of a pure substance occurs at a particular constant temperature called boiling point.
First, the change of state from a gas to a liquid is called condensation. Second, a pure substance condenses at a temperature equal to its boiling point.
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Answer:
The Hadean eon represents the time interval between 4.6 billion to 4 billion years back. It is marked by the initial formation of the earth , right from the time of gathering and accumulation of interstellar dust particles and gases, and there was frequent collision between the planetesimals of relatively larger in size. The core and the crust formed and started to become stable and also gradually led to the formation and expansion of the ocean and the earth's atmosphere.
This is how the earth gradually started to form and develop and took the shape during the time interval between 4.6 billion to 4.2 billion years old, and where the oldest rocks found on earth is dated from about 4.2 billion years in the past.
The Red Sea is a seawater inlet of the Indian Ocean, lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab el Mandeb strait and the Gulf of Aden.
Answer:
the Appalachian Mountain
Explanation:
The European settlers in what is now the United States quickly started to push the natives of their lands and create their colonies. As they were doing so, they started to establish towns and villages, create their own plantations, implement their rules and laws. But this was all happening along the eastern coastline and in close proximity to it. The reason for this was that they had a very big natural barrier in front of them that didn't allowed them to spread out toward the west. This natural barrier were the Appalachian Mountains. The Appalachians are a mountain range that separates almost all of the eastern coastline area from the interior of the country. These mountains are relatively high, had very dense impenetrable forests, and were very dangerous for crossing, so the Europeans avoided them until they developed better means of travel and transportation.
