Roast whole (thawed) chickens for 20 minutes per pound, plus an additional 15 minutes. High heat method (this creates a crispy, darker skin): Preheat oven to 450 degrees F (230 degrees C) and cook whole (thawed) chicken for 10-15 minutes. Then reduce the temperature to 350 degrees F (175 degrees C) and roast for 20 minutes per pound. (Do not add the extra 15 minutes to the cooking time as with the regular method.) VIDEO: Orange Herb Roasted Chicken. Here's a roast chicken recipe that follows the regular-roast method.
The air is made up of atoms, mostly those of nitrogen and oxygen. A complete listing of the composition of the earth's atmosphere can be found at this address: http://education.jlab.org/glossary/abund_atmos.html. Author:
The thin envelope of air that surrounds our planet is a mixture of gases, each with its own physical properties. The mixture is far from evenly divided. Two elements, nitrogen and oxygen, make up 99% of the volume of air. The other 1% is composed of trace gases, the most prevalent of which is the inert gaseous element argon. The rest of the trace gases, although present in only minute amounts, are very important to life on earth.