I suppose you are taking Earth Science and are in Grade 9??
Basalt --
Color: Black
Composition: Mafic
Texture: Aphanetic
Cooling/Crystallization History: Extrusive and Fast
Tectonic Setting: Hot Spots, Divergent Plates, Mid Ocean Ridges
Determining Factor: Basalt is Aphanetic and has Small Crystals
Streak: white.
Cleavage: Basalt has no cleavage, it has fracture...