The landforms formed when horizontal rock layers are squeezed together and buckle are called folded mountains. This means that this mountains are formed as a result of the compression of tectonic plates. The majority of the earth’s well-known mountain ranges are formed this way and are examples of fold mountains. Fold mountains have arcuate shape and the mountains’ length greatly exceeds the width.
Answer:
Olmec were the ancient people who were well known for the major civilization that has occurred in the past, like the Nile and the Indus valley civilization. They are also known as rubber people. They got extinct back about 400 BC.
The Olmec people were good at carving stones and building historic monuments. They have constructed many buildings which were very beautifully designed. They also made many sculptures and heads of Olmec people which were assumed to be their kings or superiors.
c. 40,000 K
b. 23,000 degrees C
d. 2,000,000 degrees C
Answer:
Option (C)
Explanation:
The O stars are the hottest of all the stars which have a maximum temperature of approximately 40,000 K. They appear to be bluish in color. The hydrogen present on the surface of this type of stars are fully ionized, due to which it's surface temperature is extremely high. Some of the visible elements are also present such as oxygen, silicon, helium, and nitrogen.
These stars can survive for a period of nearly 10 billion years. These are the main sequence stars with high luminosity.
Thus, the correct answer is option (C).
Answer:
1- Option (C)
2- Option (D)
3- Option (A)
4- Option (E)
5- Option (B)
Explanation:
Antarctica.
Pangaea.
North America.
About 260 million years ago, Earth's continents pushed together to form the supercontinent called Pangaea.
Many people have listened of Pangaea, the supercontinent that included all continents on Earth and started to break up about 175 million years ago. But before Pangaea, Earth's landmasses pulled apart and smashed back together to form supercontinents continually. Pangea, also spelled Pangaea, in early geologic time, a supercontinent that included almost all the landmasses on Earth.
Scientists believe that Pangea busted apart for the same reason that the plates are moving today. The movement is compelled by the convection currents that move over in the upper zone of the mantle. This action in the mantle causes the plates to move gradually across the surface of the Earth. Pangea was encircled by a global ocean called Panthalassa, and it was totally constructed by the Early Permian Epoch (some 299 million to about 273 million years ago).
Pangaea Proxima (also called Pangaea Ultima, Neopangaea, and Pangaea II) is a potential future supercontinent configuration. Consistent with the supercontinent cycle, Pangaea Proxima could happen within the next 200 million years.
Although so-called spreading centers (linear boundaries between diverging plates on the sea floor characterized by rising magma) have been shown to exist, an description of how mantle convection actually works remains elusive to this day. Everyday geology has shown that Pangea did actually exist.
To learn more about Pangaea, refer
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