| Answer | Crossword Clue |
|---|---|
| IRONORE | Source of the most widely used metal |
| cesium | a silver-white soft ductile element of the alkali metal group that is the most electropositive element known and that is used especially in photoelectric cells see element table |
| reindeers | A deer of the tundra and subarctic regions of Eurasia and North America, both sexes of which have large branching antlers. Most Eurasian reindeer are domesticated and used for drawing sleds and as a source of milk, flesh, and hide |
| TINMINE | Source of a metal once used for foil |
