Construction bidding. Construction bidding is the process of submitting a proposal (tender) to undertake, or manage the undertaking of a construction project. The process starts with a cost estimate from blueprints and material take offs.
In the Earth's crust, the most common elements are:    Oxygen 46.1%   Silicon 28.2%   Aluminum 8.23%   Iron 5.63%   Calcium 4.15%   Sodium 2.36%  â¦  Magnesium 2.33%   Potassium 2.09%   Titanium 0.565%   Hydrogen 0.14%   In the atmosphere, the most common elements are Nitrogen and  Oxygen.he most common gas in the earth's atmosphere is in fact, nitrogen, with it making up 78% of the air you're breathing right now. However, oxygen does make up 21% of the air. + 57 others found this useful.
[/caption]There are different gases in the atmosphere. Thereâs nitrogen (the most abundant of them all), oxygen, and argon. There are of course a lot more but theyâre no more than 1% of the entire atmosphere. Among the minority are the greenhouse gases, carbon dioxide being the most prominent of them all. These gases are presently cast as harmful to the planet, being the primary cause of global warming. Of course, theyâre only harmful because theyâve exceeded their ideal levels.