San Francisco earthquake of 1906 <span />
East of the Rocky Mountains is the so called Midwest region in North America. This vast region is mostly consisted of lowlands covered with grasses, and they are bordered with mountain ranges on both the east and the west, which prevents the maritime influence.
Because of this natural barriers, this region has mostly continental air masses influencing its climate. In the colder period of the year they are continental polar air masses, forming over Canada and moving southwards. In the warmer period of the year they are continental tropical, forming in the southern part of this region and moving northwards.
This type of air masses bring in very hot and dry summers, and very cold and snowy winters.
Answer:
Head
Explanation:
The original rock ( protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.
The bonds in the wood between the atoms in its structure contain potential energy. Lighting the wood on fire introduces a combustion reaction which ignites this energy. Potential energy is transformed into chemical energy as the wood burns to create heat, smoke (released into the air), and soot (by product of burning the wood).
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