Biology

2. a linear sequence of organisms,which nutrients and energy pass around as one organism eats another
6. the variety of life in the world/habitat/ecosystem
7. colorless gas that is necessary for most plant and animal life
9. animal that naturally preys on others
11. provides sunlight, life and warmth
12. best teacher
14. community of organisms and their environment
16. a large area with a specific climate and certain types of living things
18. animal that feeds on plants
19. tiny, single-celled organisms
20. animal that eats both plants and meat (animals)

1. living factore
3. animal that eats meat (animals)
4. clear, colorless, odorless, and tasteless liquid essential for most living things to survive
5. a network of interconnecting food chains in an ecological community
8. substances that is essential for growth and maintenance of life
10. organism that breaks down organic material (fungi/bacteria)
13. non-living factors
15. individual living thing
17. animal that is hunted and killed by another for food