Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Chemistry yezvakatipoteredza ndiyo fundo yesayenzi yezvinhu zvemakemikari uye biochemical zvinoitika munzvimbo dzomusikirwo. Hazvifaniri kuvhiringidzwa nemakemikari akasvibirira, ayo anotsvaka kuderedza kusvibiswa kunobvira panobva kusvibiswa. Rinogona kurondedzerwa sokudzidza nezvemanyuko, maitiro, kutakurwa, migumisiro, uye magumo emarudzi emakemikari mumhepo, ivhu, uye mvura; uye mugumisiro webasa romunhu nebasa rezvinhu zvipenyu pane izvi. Makemikari ezvakatipoteredza isayenzi inobatanidza zvidzidzo zvakasiyana-siyana inosanganisira makemikari emuchadenga, emvura uye ivhu, pamwe chete nekuvimba zvakanyanya nekemikari yekuongorora uye kuva nechokuita nemasikirwo uye dzimwe nzvimbo dzesayenzi.  Mubvunzo: Ndedzipi dziri mhando nhatu dzemakemikoro dzinoumba makemikoro emhoteredzo?
mumhepo, mumvura uye muvhu