| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| ozone layer is present in | 1.86 | 0.2 | 5524 | 23 |
| ozone layer is present in which sphere | 1.34 | 0.8 | 9873 | 22 |
| ozone layer is present in stratosphere | 1.56 | 0.1 | 169 | 99 |
| ozone layer is present in which layer | 1.23 | 0.3 | 8072 | 5 |
| ozone layer is present in mesosphere | 0.57 | 1 | 224 | 79 |
| ozone is present in which layer | 1.1 | 0.9 | 5001 | 54 |
| ozone is present in which layer of atmosphere | 0.97 | 0.9 | 2358 | 81 |
| ozone layer presentation | 1.04 | 0.5 | 7563 | 1 |
| where is ozone layer present | 1.18 | 1 | 8588 | 87 |
| what sphere is the ozone in | 0.07 | 0.7 | 6162 | 81 |
| ozone layer present in which layer | 1.34 | 0.2 | 3759 | 17 |
| in which layer is ozone present | 1.57 | 0.4 | 2815 | 35 |
| which layer is the ozone layer in | 0.05 | 0.7 | 1714 | 94 |
| ozone layer is present in the stratosphere | 0.83 | 0.7 | 1766 | 33 |
| which layer is the ozone layer located | 1.31 | 0.6 | 5699 | 96 |
| the ozone layer is in the stratosphere | 1.52 | 0.2 | 3351 | 6 |
| what sphere does ozone belong | 1.21 | 0.2 | 7441 | 16 |
| what layer of the atmosphere is ozone | 0.04 | 0.7 | 2050 | 70 |
| ionosphere contains the ozone layer | 0.13 | 0.8 | 1284 | 40 |
