2. Describe the changes which have taken place on the earth from the early time to present day time.

2. Describe the changes which have taken place on the earth from the e

1.	2. Describe the changes which have taken place on the earth from the early time to present day time.
Answer» When earth was first formed, its atmosphere was likely composed of hydrogen, helium, and other gases that contained hydrogen.Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds.