1. Chapter 18 Review

2. Organisms are divided into three groups, based on how they get energy: Producers Consumers Decomposers

3. ____________ are organisms that eat other organisms Answer: consumers

4. Producer Producer makes its own food

5. There are three main types of consumers: Herbivores Carnivores Omnivores

6. An ________________ eats only plants herbivore

7. An __________________ eats both plants and animals. omnivore

8. A _________________ is a consumer that eats only animals. Answer: carnivore

9. A _________________ is an omnivore that eats remains of dead organisms. Answer: scavenger

10. Organisms that get energy by breaking down the remains of dead organisms are ______________ Answer: decomposers

11. Predator and Prey Predator: Organism that kills and eats another organism Prey: Organism that is killed and eaten by another organism

12. symbiosis Relationship in which 2 organisms live in close association with each other

13. Competition 2 or more species trying to use the same resources

14. Mutualism Relationship between two species where both benefit Bee: gets nectar from flower ☺ Flower: Bee spreads pollen ☺

15. Biotic and Abiotic Biotic: Living factors in the environment Abiotic: Nonliving factors in the environment

16. A _________________ shows how energy in food flows from one organism to another Answer: food chain

17. A ________________ is a diagram of overlapping food chains Answer: food web

18. Biosphere The part of the earth where life exists

19. Ecology Study of interactions of living things and their environments

20. This food pyramid shows that there is little energy at the top Food Pyramid

21. Defensive Chemicals Chemicals used as defense by prey Poison Ivy