QSA 5-9 Review

4. Most changes in the water cycle such as evaporation are ___.
5. A volcano can block this when it blows ash and dust into the atmosphere.
7. This key uses physical characteristics like number of wings to identify organisms.
10. The type of energy used by producers to start photosynthesis.
11. Farmers choosing larger grains that could produce more food per plant is an example of ___ breeding.
13. This catastrophic event can cause soil erosion along rivers, because infiltration stops.
14. The type of energy produced by photosynthesis.
16. This process uses sunlight, carbon dioxide and water to produce food for a plant.
17. This type of rain is a type of pollution that causes chemical changes in rocks and water.
18. This community will modify the area and allow larger and more complex organisms to appear in succession.
19. Astronauts going to this planet will have to bring food, water and oxygen.

1. Most human activities in a watershed can create this.
2. The ecosystem with the fewest species is the least ___.
3. Energy is transferred from organisms in one level to those in the level above on an energy ____.
4. This process converts radiant into chemical energy.
6. This zone depends on the mass of the star.
8. ____ will carry pollution from one area to another.
9. This community grows on rocks in the first stage of succession.
12. This is an example of a pioneer of primary succession.
15. Increased amounts of this give an ecosystem stability to withstand change with a variety of adaptations, genetic diversity and more species.