About the same. About a half billion years ago it was significantly higher, and more than a billion years ago it was lower, much lower. Before 1.5 or 2 billion years ago there was no free oxygen in the atmosphere, before 3 billion years ago there wasn't any.
Lower .
Lower .
decrease
Thinner.
The higher you go in the atmosphere the lower the air pressure becomes...
Lower .
Lower .
Lower .
Yes, The oxygen content in the atmosphere was higher in the past, particularly in the carboniferous period.
when higher energy ultraviolet radiation act on the oxygen at the higher level of the atmosphere, they destroying many molecules of atmosphere.
Prehistroic animals (mainly insects hundreds of millions of years ago) were larger due to higher levels of oxygen in the atmosphere.
Warmer atmosphere
no the higher the content the higher the number ..breath or blood
Intestinal secretions have a higher sodium content in 24 hours.
yes. The darker the chocolate the higher the caffeine content. This is due to the higher cocoa content.
Primers with more GC content will affect the melting temperature. Higher GC content will have a higher melting temperature.
Higher atmosphere, called the stratosphere, would be one example.