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.
1 There are 350 different species of parrots. 2  Prices vary greatly on these colorful, noisy and sociable birds. 3  Macaws run $450-$800 and also are found in many bold colors. 4  Common African Grays can live 50-60 years and cost $230-$850 each.hopping for a pet bird: 1  Cages should be limited to a single species per cage. 2  Feed costs about $50 per year for small breeds. 3  Those wanting to create an aviary--a large outdoor structure used to house many birds together--find that finches and canaries live well together in the large units. 4  The Avian Welfare Resource Center provides an online ...