Heat makes the semi-fluid particles rise up and then come down on cooling. This causes convection currents wich moves the tectonic plates.
Mesopotamia traded with Egypt but not with the Indus Valley.
Explanation:
Mesopotamia is considered to be the birthplace of the human civilization, with the Sumerian civilization being considered as the first civilization. This civilization was located in the Middle East, between the Tigris and Euphrates rivers.
Nearby, another river valley civilization developed, the Egyptian civilization. The Egyptian civilization developed along the lower flow of the Nile River, in Northern Africa.
These two civilizations developed relations as early as the fourth millennium BC. They engaged in trade with each other, which was of mutual benefit, and which led to even further development of these two civilizations.
As river valley civilizations are considered:
- Mesopotamia
- Egypt
- Indus Valley
- China
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<span>D) the Mass of water needs to be in a closed system to control the boiling. With an open system, you can no longer measure the water vapor output and be sure that the water vapor in the bottle is equal to the water vapor in the air or beyond. It is only through the closed system that you can measure the volume, the mass difference and ensure that both are in equilibrium</span>
Answer and Explanation:
A hydro-thermal vent can be defined as a crevice on the floor of the sea from which water heated by geothermal energy erupts or issues. These vents are common near places that are volcanically active, areas where the movement of the tectonic plates is away from the spreading centers, hotspots, ocean basins,etc.
Marine researchers know the sites for hydro-thermal vents by computing the exact location of the place of active volcanic sites which provides the movement to the the tectonic plates which in turn produces gas and undergo some thermal processes making it easily detectable for the location of thermal vent sites.
They can be sure of finding a vent by calculating the activeness of active volcanic sites in the hydrological places.
