Bonus
The Verneuil (“ver-NOY”) method is primarily used to produce synthetic gemstones of this mineral. For 10 points each:
[10m] Name this crystalline form of aluminum oxide. Emery, a rock containing this mineral, is often used as an abrasive since this mineral rates a 9 on the Mohs hardness scale.
ANSWER: corundum
[10e] Gemstones of corundum include sapphire, whose blue color is caused by impurities of iron and this element. This strong, light transition metal has atomic number 22 and is common in the aerospace industry.
ANSWER: titanium [or Ti]
[10h] Corundum has the same crystal structure as this iron-containing mineral and is therefore considered part of this mineral’s “group.” Ochre contains large amounts of this mineral, whose chemical formula is Fe2O3.
ANSWER: hematite [accept hematite group]
<Editors, Other Science>
| Editions | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|
| 2 | 104 | 10.58 | 53% | 40% | 13% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| Durham A | Edinburgh B | 0 | 10 | 10 | 20 | EH |
| Durham B | Edinburgh A | 10 | 10 | 0 | 20 | ME |
| Durham C | Edinburgh D | 0 | 10 | 10 | 20 | EH |
| Durham D | Edinburgh C | 10 | 10 | 0 | 20 | ME |
| Sheffield B | York | 10 | 0 | 0 | 10 | M |
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| UK (North) | UK | Y | 5 | 18.00 | 80% | 60% | 40% |
| UK (South) | UK | Y | 8 | 12.50 | 75% | 25% | 25% |
| Northern California | US | Y | 4 | 17.50 | 75% | 50% | 50% |
| Eastern Canada (1) | US | Y | 4 | 5.00 | 50% | 0% | 0% |
| Eastern Canada (2) | US | Y | 9 | 6.67 | 33% | 33% | 0% |
| Florida | US | Y | 4 | 2.50 | 0% | 25% | 0% |
| Great Lakes | US | Y | 10 | 14.00 | 60% | 70% | 10% |
| Lower Mid-Atlantic | US | Y | 9 | 10.00 | 44% | 44% | 11% |
| Upper Mid-Atlantic | US | Y | 9 | 8.89 | 44% | 44% | 0% |
| Midwest | US | Y | 10 | 15.00 | 80% | 50% | 20% |
| North | US | Y | 4 | 12.50 | 25% | 50% | 50% |
| Northeast | US | Y | 11 | 6.36 | 36% | 27% | 0% |
| Southeast | US | Y | 12 | 11.67 | 58% | 50% | 8% |
| Upstate NY | US | Y | 5 | 6.00 | 60% | 0% | 0% |