1. All the living and non-living things interacting is an ____________________. 2. The non-living parts of an ecosystem are ________ factors. 3. The living parts of an ecosystem are __________ factors.

1. Ecosystem 2. Abiotic 3. Biotic

4. All the organisms of a species living in the same area make up a _______________. 5. All the populations living in an area make up a ______________. 6. ____________ is the study of how all living things in an ecosystem interact.

4. Population 5. Community 6. ecology

7. A place where organisms live is its ____________. 8. The role of an organism in its community is its ____________.

 7. Habitat  8. niche

9. The energy in food is passed from one organism to another in a ________________. 10. A ___________ shows the relationship between all the species in a commnity 11. __________ are consumers that eat only plants. 12. ___________ are consumers that eat only meat.

 9. Food chain  10. Food web  11. Herbivores  12. Carnivores

 13. Living things that hunt other living things for food are _________________.  14. The hunted are called ___________.  15. ____________ feed on the remains of dead animals.  16. A consumer that eats both plants and animals is an _________________.

 13. predators  14. prey  15. scavengers  16. omnivores

 17. A relationship between two kinds of organisms that lasts over a period of time is called ___________________.  A relationship between two kinds of organisms that benefits both of them is __________________  A relationship between two kinds of organisms in which one benefits and the other is harmed is _______________.

 17. symbiosis  18. mutualism  19. parasitism

 20. A relationship between two organisms in which one benefits and the other is neither helped nor harmed is _______________.  21. Anything that controls the growth or survival of a population is called________ ________.  22. The maximum population size that the resources in an area can support is its ______ _______.

 20. Commensalism  21. limiting factor  22. carrying capacity

 23. The species is endangered of becoming extinct is an __________ ____________.  24. A species that has died out completely is ____________.  25. The species may become endangered is a ___________ ______________.

 23. endangered species  24. extinct  25. threatened species.