Unit 3: Matter and Energy in Living Systems

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Across
  1. 4. (two words) The movement of a particular chemical through the biotic and abiotic components of an ecosystem.
  2. 6. An energy-carrying molecule that stores energy in a phosphate-phosphate bond and serves as energy currency for cell processes.
  3. 8. An organelle in plant cells where light absorption and photosynthesis take place.
  4. 9. A measure of the total dry mass of organisms in a given ecosystem at the time of measurement.
  5. 13. (two words) A process that releases chemical energy from sugars and other carbon-based molecules to make ATP when oxygen is present.
  6. 14. Not requiring oxygen to take place.
  7. 15. Requiring oxygen to take place.
Down
  1. 1. (two words) A model of the transfer of energy beginning with producers and working up the food chain to the top-level consumer.
  2. 2. (two words) A model that compares the biomass at different trophic levels within an ecosystem.
  3. 3. A process used by plants, algae, and some bacteria to capture and transform light energy from the sun and store it in high-energy sugar molecules.
  4. 5. (two words) A model of the complex network of feeding relationships between trophic levels within an ecosystem.
  5. 7. (two words) A sequence that links species by their feeding relationships.
  6. 10. Organisms that make their own food by capturing light energy or using chemical energy to produce sugars.
  7. 11. An energy-carrying molecule that carries high-energy electrons. In photosynthesis, it helps provide energy to convert carbon dioxide into sugars.
  8. 12. An organelle where cellular respiration takes place, releasing the chemical energy required to make ATP. The plural is mitochondria.