| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| exchange surfaces and substances | 1.89 | 1 | 8171 | 6 | 32 |
| exchange | 0.18 | 0.7 | 7221 | 25 | 8 |
| surfaces | 0.24 | 0.3 | 847 | 82 | 8 |
| and | 0.03 | 0.6 | 6553 | 6 | 3 |
| substances | 0.14 | 0.4 | 7693 | 21 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| exchange surfaces and substances | 0.47 | 0.5 | 5248 | 30 |
| what are exchange surfaces | 1.43 | 0.6 | 5781 | 70 |
| what are exchange surfaces in biology | 0.04 | 0.7 | 8702 | 62 |
| diffusion and exchange surfaces | 1.74 | 0.3 | 8923 | 23 |
| where are exchange surfaces found | 0.52 | 0.5 | 808 | 87 |
| exchange surfaces a level biology | 0.24 | 0.8 | 599 | 48 |
| examples of exchange surfaces | 1.12 | 0.4 | 5512 | 60 |
| exchange surfaces in humans | 0.76 | 0.9 | 6697 | 5 |
| exchange surfaces and breathing | 0.84 | 0.9 | 5855 | 22 |
| exchange surface definition biology | 1.26 | 0.8 | 2416 | 97 |
| features of exchange surfaces | 0.14 | 1 | 2516 | 34 |
| free science lessons exchange surfaces | 1.49 | 0.1 | 3321 | 91 |
| examples of specialised exchange surfaces | 1.7 | 0.7 | 8793 | 100 |
| whya re exchange surfaces needed | 0.66 | 0.6 | 9625 | 49 |
| exchange surfaces gcse biology | 0.97 | 0.2 | 4449 | 73 |
| exchange with commercial substance | 1.46 | 0.6 | 1919 | 91 |
| how many specialised exchange surfaces | 0.92 | 0.3 | 4348 | 5 |
| how are exchange surfaces adapted | 0.42 | 0.7 | 6618 | 19 |
