| A | B |
|---|
| savannah | grassland with scattered trees |
| food chain | transfer of energy from one organism to another |
| climax vegetation | dominant plants in a region |
| photic | thin layer of ocean where food is produced |
| neritic zone | the area above the continental shelf in the ocean |
| benthic zone | the bottom of the ocean is known as |
| aphotic | an area of the ocean where no photosynthesis occurs |
| ecological pyramid | has less energy as it moves up the trophic level |
| heterotroph | food consumers of ecosystems |
| ozone layer | protects organisms from harmful radiation |
