Describe the general characteristics of each of the gases a) air
b) water vapour
c) carbon dioxide
d) methane gas

a) the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen

b) water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice

c) it is present in the Earth's atmosphere at a low concentration and acts as a greenhouse gas

d) is also a greenhouse gas (GHG), so its presence in the atmosphere affects the earth's temperature and climate system

b is the right answer for this question.

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks