ipu uamea fausaga:
E masani ona faʻaaogaina mo le gaosiga o fausaga uʻamea, alalaupapa, vaʻa ma taʻavale.
ipu uamea tau:
O le faʻaopoopoga o elemene faʻapitoa (P, Cu, C, ma isi) o loʻo i ai le lelei o le faʻafefeteina ma le faʻafefe o le ea, ma faʻaaogaina i le gaosiga o koneteina, taʻavale faʻapitoa, faʻapea foʻi ma fausaga fale.
ipu uamea fa'apitoa ta'avale vevela:
Uamea carbon, uamea u'amea ma uamea meafaigaluega mo fausaga fa'ainisinia lautele o lo'o fa'aaogaina i le gaosiga o vaega fa'ainisinia eseese pe a mae'a fa'ainisinia togafitiga vevela.