Are moist chemicals on earth elements, compounds or mixture??
Most chemicals on Earth are mixtures. For example, the air you breath is the mixture of oxygen, nitrogen, carbon dioxide, argon, ... etc. Buildings are made of steel, which is the mixture of iron and other elements. Food contains a mixture of sugar, protein, and fat.
Most chemicals on Earth are not elements or compounds, because pure substances (elements+compounds) are rare. They are often bound to one another because Earth's environment rarely support the isolation of a pure element or a pure compound. Thus, it is less likely to find something on Earth which is either element or compound. On the other hand, it is more likely to find mixtures on Earth.