Unit 3 Vocab Crossword

2. model that shows the complex network of feeding relationships within an ecosystem
7. process that requires oxygen to occur
9. level of nourishment in a food chain
12. movement of a chemical through the biological and geological, or living and nonliving, parts of an ecosystem
16. light-absorbing pigment molecule in photosynthetic organisms
17. organism that obtains energy by eating only plants
18. process of producing up to 38 ATP molecules by breaking down carbon-based molecules when oxygen is present
20. organism that obtains its energy and nutrients by eating other organisms

1. process by which light energy is converted to chemical energy; produces glucose (sugar) and oxygen from carbon dioxide and water
3. detritivore that breaks down organic matter into simpler compounds, returning nutrients back into an ecosystem
4. bean-shaped organelle that supplies energy (ATP) to the cell and has its own ribosomes and DNA
5. a simple sugar; the main fuel for cellular respiration
6. process that does not require oxygen to occur
8. organism that obtains energy by eating both plants and animals
10. organism that obtains its energy from abiotic sources, such as sunlight or inorganic chemicals
11. organism that obtains energy by eating only animals
13. organelle composed of numerous membranes that are used to convert solar energy into chemical energy; contains chlorophyll
14. anaerobic process by which 2 ATP molecules are produced by glycolysis
15. model that links organisms by their feeding relationships
19. adenosine triphosphate; high-energy molecule that contains, within its bonds, energy that cells can use