00:01
Hello students, in this question we are asked about the transition of venus from a habitable planet habitable to inhabitable planet.
00:17
So the transition of venus happened over a long period of time.
00:22
So first of all the earlier conditions in the venus was like billions of years ago.
00:28
The venus had conditions similar to that of earth right with liquid water present, the atmosphere having a very very effective conditions for life to thrive.
00:43
But what happened is that there is over time there are there were a series of events that led to the buildup of greenhouse gases, greenhouse gases and the greenhouse effect had a very important role in this transition.
00:59
So you can see so the venus atmosphere is composed mostly of 96 % carbon dioxide, co2.
01:11
So this is a potent greenhouse gas.
01:13
So that is the reason why the greenhouse effect on the venus is so strong.
01:19
So it causes the surface temperatures to raise up to 467 degrees celsius which is 872 degrees fahrenheit.
01:29
So that kind of temperature which is hotter than the surface of mercury, even mercury is closer to the sun compared to venus.
01:40
So mercury is here and the venus is here.
01:43
So this is rotating in a different much farther orbit and even then the temperature the surface temperature is too high because of this greenhouse effect.
01:56
And the venus surface is characterized by planes, vast planes covered in volcanic rock right.
02:04
Volcanic rock is there and there is volcanic activity and volcanic lava channels are there.
02:12
So there are constant eruptions of volcano and it is very intensive.
02:19
It has contributed to the release of carbon dioxide, more carbon dioxide onto the surface because of that and also other gases that enables greenhouse effect.
02:31
And the other thing is that the venus lost its water to solar wind.
02:39
So solar wind, solar wind, so what happens is that solar wind will break down water into hydrogen and oxygen...