How do I make element symbols?

Each element is given its own chemical symbol, like H for hydrogen or O for oxygen. Chemical symbols are usually one or two letters long.

Explanation:Every chemical symbol starts with a capital letter, with the second letter written in lowercase. For example, Mg is the correct symbol for magnesium.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.