Figure 9.1 India provinces and princely states before 15 August 1947
Indian history and that was Muslim League; they presented two-nation theory and these two nations are Hindus and Muslims. They presented these two religions as two nations, and clearly, they stated that it was not possible for them to live together in the newly independent country because Muslims are in minority and Hindus are in majority. They could not see more opportunities to progress their community. Their customs are different, and therefore, it was not possible to live together. Many things were done in this period. We cannot blame someone because many factors were caused due to this situation. The fundamentalists of both Hindus and Muslims played a role in dividing Hindustan in India and Pakistan. It is really painful situation for millions of people who migrated from India to Pakistan and Pakistan to India. The severally affected area by partition is Punjab, Rajasthan, more...
Some important facts about Earth
Age ? 4.6 billion years
Mass ? 5.972 x 10 (power 24) I
Volume ? 1.083 x 10 (power 24) I
Average density ? 5,514 kg/I
Shape ? Oblate Spheroid
Surface area ? 51,00,66,000 sq. km
Equatorial diameter ? 12,756 km
Polar diameter ? 12,713.6 km
Average surface temperature ? 14.c. Highest is 58.c (Libya) and lowest is
89.c (Antarctica)
Highest land point ? mt. Everest (Nepal) 8,850 m
Deepest ocean point ? Mariana trench (Pacific Ocean) 11,033 m
Speed of rotation around sun ? 29.8 km/s
Distance from sun ? 15-2 million km (at aphelion) and 147
million km (at perihelion)
Earth was also formed almost at the same time when sun became a star; that is, 4.6 billion years ago. The sun is formed when nebula collapsed due to gravity. It started to spin faster and condensed into dust. Largely, all materials were gone into the centre and the sun was formed. The remaining particles that were available in the dust collided together to form various bodies and earth is one of them (refer Chapter 1, Solar System).
If we trace the history of the earth, we will know that it had been divided into four eras: Hadean, Archean, Proterozoic, and Phanerozoic. The first three are called Precambrian. Archaean is the time when the first life on the earth came into existence. The Phanerozoic can also be understood in three eras: Palaeozoic, Mesozoic, and Cenozoic.
It is important to understand that the earth is surrounded by air that gets thicker as we go away from the surface (approximately 160 km). However, the atmosphere is found at 600 km above from the earth. Troposphere is the lowest layer of atmosphere and is always in motion. Sunlight heats the body of the earth that causes rain (systematic process). The atmosphere is about 48 more... You need to login to perform this action.
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