Materials for Each Group. 1  9-volt battery. 2  2 wires with alligator clips on both ends. 3  2 pencils sharpened at both ends. 4  Water. 5  Salt. 6  Clear plastic cup. 7  Tape.
Nubian people The Nubians are an ethnic group originally from northern Sudan, and southern Egypt. The Nubian people in Sudan inhabit the region between Wadi Halfa in the north and Al Dabbah in the south.
The noun NB has 2 senses: 1. a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium. 2. a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something. Familiarity information: NB used as a noun is rare.