A terrestrial ecosystem is a land-based community of organisms.
Lively is your answer.
Hope this helped! (:
The acidity of the body's fluid is determined by the concentration of hydrogen ions.
Hydrogen ions with the formula H3O+(H2O)n are developed by the addition of protons to one or more water molecules. It is made up of a proton or a particle carrying a unit positive electric charge.
That looks confusing as hell so instead of answering im gonna waste your time. Good luck bud. School sucks. Its a buncha bull. None of this is gonna help you in the real world.