Calcium content: Calcium carbonate is the most prevalent calcium supplement in the market. It provides more elemental calcium than calcium citrate, so you may not need to take as many pills. As in the example explained in the elemental calcium section, a 500 mg calcium carbonate provides 200 mg elemental calcium.
In the Earth's atmosphere, temperature varies greatly at different heights relative to the Earth 's surface. The coldest temperatures lie near the mesopause, an area approximately 85 km (53 mi) to 100 km (62 mi) above the surface.n the Earth's atmosphere, temperature varies greatly at different heights relative to the Earth 's surface. The coldest temperatures lie near the mesopause, an area approximately 85 km (53 mi) to 100 km (62 mi) above the surface.
Definition. a thin blanket of air surrounding the earth - 99% lies within 30 km of earth's surfacedivided into 5 main layers with temperature of each layer varying with altitude:1. TROPOSPHERE-harbors nearly all living things and nearly all human activity, temperature temperature decreases as altitude increases2. STRATOSPHERE-temperature increases as altitude increases3. THERMOSPHERE-temperature increases as altitude increases4.