Many schools report your GPA on a 4.0 scale. Obtaining this grade at the end of the semester would be the equivalent of getting all A's or perfect scores in all your classes. If you have perfect scores all around then there is no need to use this calculator as your GPA is obviously 4.0.
coral. 1  the hard, variously colored, calcareous skeleton secreted by certain marine polyps. 2  such skeletons collectively, forming reefs, islands, etc. 3  the solitary or colonial polyp that secretes this calcareous skeleton. 4  a reddish yellow; light yellowish red; pinkish yellow.
The Worldâs 10 Largest Coral Reefs. Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals. These corals are unable to move and clusters with other corals so they form colonies. Coral reefs vary in size, type and location and they are very sensitive organisms. They want clear and hot waters.