biology

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  1. 2. a substance that takes part in and undergoes change during a reaction.
  2. 3. an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients.
  3. 4. a chemical element that constitutes 21 percent of the Earth's atmosphere, that is capable of combining with all elements except some noble gases, that is active in physiological processes of almost all known organisms, and that is involved especially in combustion
  4. 6. consist of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas,an acidic colorless gas with a density about 53% higher than that of dry air.
  5. 8. the breakdown of glucose by enzymes, releasing energy and pyruvic acid.
  6. 9. energy-carrying molecule found in the cells of all living things. ATP captures chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes.
  7. 11. the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
  8. 13. a simple sugar with the molecular formula C₆H₁₂O₆.
  9. 14. the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
Down
  1. 1. is the respiration using electron acceptors other than moleculer oxygen
  2. 5. the process of producing cellular energy involving oxygen
  3. 7. the transformation of heat, the energy that comes from the sun. It has been used for thousands of years in many different ways by people all over the world
  4. 10. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
  5. 11. Chemical energy is the energy of chemical substances that is released when they undergo a chemical reaction and transform into other substances.
  6. 12. products are the species formed from chemical reactions.