1. what are three of the rock art periods in africa? describe each.

Rock Art are images that have been drawn, carved, or painted on rock surfaces that are not movable. These rock arts tell stories about the past and what people have been doing in their daily lives. The three rock art periods in Africa are: 

a. Petroglyphs - images that are carved on the surface of rocks.
b. Pictographs - images that have been painted on rocks, particularly the ones found in caves. 
c. Earth figures - images that have been formed on the ground. 

Corn and beef broth the american and mexicans ate