Occurs naturally on earth
Can you provide more specific details? I’m not even sure what this question is about.
There are 6 elements that are the most important. The acronym, CHNOPS, is an easy way to remember these.
C - Carbon
H - Hydrogen
N - Nitrogen
O - Oxygen
P - Phosphorous
S - Sulfur
That students who study make better grades than those who do not.
