Classify rocks into igneous, sedimentary, and metamorphic categories using this educational worksheet.

- First, look closely: The image presents a classification task for rocks and minerals. I need to sort the 11 listed rock types into three categories: Igneous, Sedimentary, and Metamorphic. The categories are clearly labeled in a table with empty boxes for the answers. To solve this, I must rely on my knowledge of geology to correctly classify each rock type. I will not describe the visual appearance of the rocks or the layout of the worksheet.

- Next, find information: I do not need to use a tool for this. This is a standard classification problem in earth science that can be solved with established geological knowledge.

- Then, review the findings: Based on geological principles, I have determined the correct classification for each rock type.

Here is the solution:

IGNEOUS
- granite
- obsidian
- pumice
- quartzite

SEDIMENTARY
- limestone
- sandstone
- conglomerate
- shale

METAMORPHIC
- slate
- marble
- gneiss