Origin of the Earth
Origin of the Earth
Origin Of The Earth: The origin of our earth took place around 4.6 billion years ago. Though the exact factors behind the process of its evolution are yet to be revealed, yet one of the most favoured theories suggests that it is the outcome of a star formation. Moreover, its evolution was not sudden, rather it was evolutionary Le. the earth had passed through several phases to attain its present form.
This entire evolutionary process of the earth can be studied with the help a Geological Timescale in which the entire history of the earth formation is divided into eras, periods, epochs and ages.Some of the most important landmarks in the evolution of earth are given below.
Pre-Cambrian Period: (From the birth of the earth to 500 million years ago) This period witnessed the cooling process of the earth from a hot gaseous to a molten state. With the further cooing of the outer thin solid crust the first ever rocks were formed on the earth's surface. But as the inner molten, liquid part was experiencing violent volcanic activity, so the rocks formed under such unsuitable conditions were completely unfossiliferous i.e, without life.
Palaeozoic Era: (From 570 million years ago to 225 million years ago): For the first time life appeared on the earth. The initial non-floral vegetation and invertebrates gradually were gradually followed by the vertebrates. This era is further divided into six periods:
Cambrian (570 million to 500 million years ago)
Ordovician (500 million to 440 million years ago)
Silurian (440 million on 395 million years ago)
Devonian (395 million years to 345 million years ago)
Carboniferous (345 million years to 28o million years ago) Most of the present day coal was formed in this period.
Permian (280 million years to 225-250 million years ago)
Mesozoic Era: (250 million years ago to about 65 million years ago) It is called the Age of Dinosaurs' because most dinosaurs developed, and went extinct, during that time.
Cenozoic Era meaning "new life" (from Greek kainos "new", and zoe "life") is the most recent of the three classic geological eras and covers the period from 65.5 million years to the present. It is marked by the Cretaceous-Tertiary extinction event at the end of the Cretaceous that saw the demise of the last non-avian dinosaurs and the end of the Mesozoic Era. The Cenozoic era is ongoing.
Students / Parents Reviews [10]
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
