2. Decomposers

3. 1. Sun 2. Producers 3. Herbivores 4. Carnivores 5. Scavengers

4. consumers

5. Omnivores

7. PLANTS

8. All the oak trees in a forest

9. ~ An orchid living on a tree branch

10. ~A tick feeding on an bird

11. mutualism

12. Food web

13. an ecosystem

14.  contains only a biotic environment. Living Things: tree squirrel Fish bird

16.  consumer

17. scavengers

18. Not alive-but natural: soil, rock, water, oxygen

19.  a biome can contain one or more ecosystems.

20. Tropical rainforest

21. desert

24. The tundra

25.  1. A rainbow trout  2. All the rainbow trout in a stream  3. The water, rocks, and organisms in a stream  4. All the rainbow trout, other fish, and insects in the stream

26. People in a community cut down trees in a forest so they could use the wood. They cut down many trees each year. After several years, a population of rabbits in a nearby field had become so large that the rabbits were causing problems for the community. What is the explanation?

27. Biomes Tundra Desert Deciduous Forest Tropical Rainforest Grasslands Coniferous Forest

28. Energy Pyramid for the Food Web Who are the producers? Seaweed and phytoplankton Seaweed & phytoplankton What are the herbivores? Limpets and zoo plankton Prawn, crabs, whelk, mussels Fish gull, lobster