Across
- 1. Organisms that are too small for people to see with only their eyes
- 5. Area in the sea where scientists take care of coral reefs
- 6. number of living organisms of same species
- 7. the returning back of habitat to its natural state
Down
- 2. small pieces of plastic that cause harms for marine organisms
- 3. Flying living organisms that build nests at the top of mountains
- 4. It is conditions which coral reefs turn into white
- 8. transfers between animals of the food web