A. The pressure is lower as you gain altitude because there are more molecules of oxygen and nitrogen. B. The pressure is lower as you gain altitude because there are less molecules of oxygen and nitrogen. C. The pressure is the same because there is no change in the number of molecules.
The price of a cockatiel depends on a few factors. Firstly the price depends on whether or not the bird is tamed. For a tamed cockatiel it would cost around $80 - $120 and a untamed cockatiel would cost $15-$30 (AUS) Also the colouring of the cockatiel plays a part in the cost of the bird, as more rare colours (such as lutino or pearl cinnamon) may increase the cost of the cockatiel.
Due to the fact that Quakers are prolific and easy breeders, they are very reasonable in price. Handfed babies can be purchased for $50 to $200. This price is for the normal green Quaker.s a comparison, the Quaker is a bird similar in length to a Cockatiel, but the Quakerâs body is heavier and more substantial with an average weight of 90 to 120 grams. The overall color of the Quaker is green, with pale grey on the forehead, cheeks, throat and extending down to the chest.