| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| how many different rocks are there | 1.32 | 0.1 | 3606 | 31 |
| how many different rocks are there on earth | 0.67 | 0.4 | 3210 | 2 |
| how many different types of rocks are there | 1.03 | 0.6 | 4794 | 11 |
| how many different kinds of rocks are there | 0.24 | 0.2 | 376 | 38 |
| how many different rock types are there | 1.92 | 0.2 | 259 | 76 |
| how many categories of rocks are there | 1.74 | 1 | 286 | 23 |
| how many rocks are there on earth | 1.75 | 0.3 | 4751 | 12 |
| how many types of rock | 1.6 | 0.3 | 4265 | 92 |
| how many rocks are in the world | 0.14 | 0.7 | 2888 | 72 |
| facts about different types of rocks | 0.84 | 0.3 | 1624 | 9 |
| all kinds of rocks | 1.64 | 1 | 815 | 86 |
