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
A positive ion is formed when an atom loses one or more of these
One can be used to step up or step down an alternating current
The inventors of this tiny device won the 1956 Nobel Prize for Physics
It describes objects through which light can pass, but through which you can't see clearly