Download Name: Date

Name: _____________________________
Date: __________________
CHAPTER 18:
INTERACTIONS OF LIVING THINGS
STUDY GUIDE
(Use your textbook, Chapter 18, pages 480 – 501, Directed Readings, class notes and
vocabulary cards to complete.)
1. A ___________________________________ eats the remains of dead organisms.
2. What is a herbivore? _______________________________________________
__________________________________________________________________
3. What is camouflage? _______________________________________________
__________________________________________________________________
4. What is a predator? ________________________________________________
__________________________________________________________________
5. ______________________ is the study of the interactions of organisms with one
another and with their environment.
6. A ____________________________ is a group of organisms of the same species that
live together in a specific geographical area.
7. What is an ecosystem? _______________________________________________
8. Define biosphere: _____________________________________________________
____________________________________________________________________
9. A ____________________________ is all the populations of a species that live in the
same habitat and interact with each other.
10. What is an omnivore? _______________________________________________
____________________________________________________________________
11. A __________________________________ is an organism that eats animals.
12. What is a food chain? _______________________________________________
____________________________________________________________________
13. What is a food web? _________________________________________________
_____________________________________________________________________
14. An __________________________ is a diagram that shows an ecosystem’s loss of
energy.
15. ____________________________ is the main source of energy for most living
things.
16. _______________________________ is the process of carrying pollen from one
plant to another; necessary for plant reproduction.
17. _________________________________ is an adaptation that warns predators of
dangerous or poisonous prey.
18. A relationship in which 2 different organisms live in close association with each
other is called ___________________________________.
19. Define biotic: ______________________________________________________
_____________________________________________________________________
20. Define abiotic: _____________________________________________________
_____________________________________________________________________
21. List three parts of the abiotic environment: ______________________________
____________________________________________________________________
22. _________________________________ is the largest population that an
environment can support.
23. What is a limiting factor? _____________________________________________
_____________________________________________________________________
24. ______________________________ is an organism that is killed and eaten by
another organism.
25. What is mutualism? _______________________________________________
___________________________________________________________________
26. _________________________ is a symbiotic association in which one organism
benefits while the other is harmed.
27. The organism that is harmed is called the ____________________________.
The organism that benefits is called a ___________________________________.
28. What is coevolution? _______________________________________________
___________________________________________________________________
29. ____________________________ is a relationship between two organisms in
which one organism benefits and the other is unaffected.
WORD BANK
COMMENSALISM
ENERGY PYRAMID
PARASITE
PREY
FOOD WEB
AIR
PARASITISM
CARNIVORE
HOST
SUNLIGHT
CARRYING CAPACITY
ECOLOGY
WATER
SYMBIOSIS
POPULATION
FOOD CHAIN
TEMPERATURE
SCAVENGER
HERBIVORE
POLLINATION
WARNING COLORATION
COMMUNITY