Life Science Semester Review

3. takes place on land where there are no living organisms
4. all the living organisms in an environment
6. one organism benefits and the other is neither helped or harmed
8. any relationship in which 2 species live closely together
12. pattern of changes that takes place after an existing community is destroyed
14. study of the interactions among organisms and their environment
15. has low salt concentration- usually less than 1%
16. large group of ecosystems that shares the same type of climax community
17. the non-living parts of the environment
20. an organized set of investigation procedures used by scientists
22. organisms that seek out and eat other organisms
26. y-axis
27. the study of life: also known as life science

1. organisms that are eaten
2. anything that limits an organisms ability to live in a particular environment
5. the process of grdual, natural, change and species replacement that takes place in the communities of an ecosystem over time
7. things that have all the characteristics of life made of one or more cells
9. educated guess or testable prediction
10. x-axis
11. all strategies and adaptation a species uses in it's environment
13. a stable community formes after primary or secondary succession once little or no change occurs
17. organisms that use sunlight or energy stored in chemical compounds to make food because they make their food- producers
18. process that uses observation and investigation to gain knowledge about events in nature
19. organisms that rely on other organisms for their energy and food supply;also called consumers
21. the ability of living things to survive the changes in the environment
23. cover about 3/4 of earths surface and includes oceans, coral reefs, and estuaries
24. both species benefit from each other
25. one organism lives on or in organism and harms it