5th Science Chapter 1 Ecology

3. The orderly and predictable series of changes in the environment.
5. The series of changes occurring in an area where the existing ecosystem has been disturbed.
7. Ecology is considered a branch of this science.
8. A stage in the series of ecological succession.
9. All communities change over __________.
11. One of the first types of vegetation that grew and began building after a glacial retreat.
13. A scientist who studies plant life.
16. Complex organisms that produce acids to help break down rock.
17. The plant life in an area.
18. These are a natural way of clearing out thick underbrush in forests.
19. Wood from conifers or evergreen trees.
21. These softwood trees have many uses including turpentine, disinfectants, and artificial fragrances.
23. To establish growth in an ecological community.
24. Wood from broad-leaved mostly deciduous trees.

1. _____________ an ecosystem causes secondary succession.
2. Lava from a volcano in Kilauea Hawaii.
4. The first species to populate or repopulate a barren or disturbed area.
6. The base, usually rock or soil, in which an organism lives.
10. The scientific study of the relationships between organisms and their environments.
12. The series of changes occurring in a newly formed, barren habitat.
14. The plant life in an area.
15. A scientists who studies plant life.
20. Physical surface features of a place or region.
22. The biggest cause of forest fires in the US.