ch 5

1. succession which occurs on abandoned farm land
4. organisms that eat only consumers
8. the percent of food energy used up for life processes
9. parts of the ___ cycle include, photosynthesis, respiration, combustion and decomposition
10. the process in which producers make sugar and oxygen
12. organisms that eat only producers
13. an element needed to make proteins
14. underground sources of carbon from organisms that died millions of years ago
17. which is stable

1. organisms that eat producers and consumers
2. a pioneer species which breaks down rock
3. structure used to represent the energy at each trophic level
5. the type of bacteria that can make nitrogen from the atmosphere usable
6. the ultimate energy source for nearly all ecosystems
7. type of species which are the first to colonize a newly available area
10. newly formed volcanic islands would be places to see ___ succession
11. energy moves from one organism to the next only ___ percent is passed on
15. has the chemical formula C6H12O6
16. shows the many feeding relationships between organisms