In 1989 Alfredo Cristiani won election as this country's pres., succeeding Jose Napoleon Duarte
When light is passed thru a prism, it produces this spread of colors
It's the branch of chemistry that deals with carbon compounds
All lines of longitude are measured east or west of this line
The Big Dipper is part of this constellation
The most important source of uranium & radium is this mineral ore
Invented by Edwin Land, it was the first instant camera
When Henry Cavendish discovered this lightest-known element, he called it inflammable air
Galileo is said to have done gravity experiments by dropping weights from this tower
In ancient times, lodestone was used as a form of this instrument