Determining the weight of 100 CDs depends on whether only the CDs are weighed or if the CDs have sleeves or jewel cases. A single CD by itself weighs about 0.58 ounces. Therefore, 100 CDs by themselves weigh 58 ounces.
Nitrogen is essential for the growth of leaves and stems, and it helps to give plants a rich, green color. If it is lacking, plants will be pale and sickly-looking, and the oldest leaves will look worse than the newer ones.
All animals need oxygen from the air to use the energy that is in the food they eat. Plants need carbon dioxide in order to make food. Water vapor makes clouds and therefore rain, possible. Nitrogen from the air is used by bacteria on plant roots. The bacteria change nitrogen into materials that plants use to grow.