"Ecology Crossword": HTML5 Crossword

Across

1. A natural fuel formed over millions of years (6,4)
4. An increase that is becoming more and more rapid (11)
6. The habitat and all of the communities of living organisms that interact with it (9)
8. A metal frame used to mark out a small area of habitat (7)
10. The non-living factors in an environment (7)
11. Showing inclination or prejudice against something (4)
13. The action of clearing a wide are of trees (13)
14. The mass of tissue in living organisms (7)
16. How living organisms are spread out in an ecosystem (12)
18. Organisms capable of creating simple carbohydrates by photosynthesis (9)
19. Animals that need to digest other organisms to survive (9)
20. The quantity of organisms in an ecosystem (9)

Down

2. Where one species depends on another species for survival (15)
3. All the organisms living in a particular habitat (9)
5. Rot or decompose through the action of bacteria and fungi (5)
7. The range and variety of organisms and habitats in a particular area (12)
9. An organism that decomposes organic matter (10)
12. gaseous waste product of aerobic respiration (6,7)
15. A natural environment that can absorb carbon dioxide from the atmosphere (6,4)
17. A group of similar organisms which can breed to produce fertile offspring (7)