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 and animals need nitrogen in order to make proteins. Proteins are essential compounds for healthy growth and fully functioning organisms. However, nitrogen is often in short supply to plants in both natural and agricultural systems. If nitrogen supply limits the growth of plants then the animals which feed on the plants will also suffer.
A: Plants need photosynthesis because the process fuels them with the energy that they require to survive. Plants create energy through photosynthesis by absorbing sunlight and converting it into sugar, lipids, proteins and other organic compounds. These compounds are forms of chemical energy and are fundamental for sustained growth and survival.