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.
Plants need nitrates to develop green leaves. Nitrogen, potassium and phosphorus are the three major nutrients plants need to grow successfully. In particular, nitrogen is responsible for foliage development. Plants use nitrogen in the form of nitrates, which is nitrogen mixed with oxygen. They usually absorb nitrates from the soil.
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.