The first United Nation Conference on Environment and Development which was held in 1992 at_________?A. Johansberg
B. London
C. New York D. Rio De Jenerio
Chichen Itza was a large pre-Columbian city built by the Maya people of the Terminal Classic period, the archaeological site is located at________?A. Brazil
B. USA C. Mexico
D. Canada
How many rows and columns are in the modern Periodic Table?A. 18 columns and 7 rows
B. 12 columns and 9 rows
C. 7 columns and 18 rows
D. 25 columns and 15 rows