| Picture | Answer | % Correct |
|---|---|---|
![]() | Obsidian | 96%
|
![]() | Granite | 92%
|
![]() | Limestone | 81%
|
![]() | Pumice | 65%
|
![]() | Sandstone | 65%
|
![]() | Shale | 65%
|
![]() | Basalt | 58%
|
![]() | Diorite | 58%
|
![]() | Conglomerate | 50%
|
![]() | Gneiss | 50%
|
![]() | Marble | 50%
|
![]() | Schist | 38%
|
![]() | Gypsum | 31%
|
![]() | Quartzite | 23%
|
![]() | Tuff | 23%
|
![]() | Chert | 19%
|