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Across 1. an organism that can capture energy from sunlight or chemicals and use it to produce its own food 3. a simple sugar that is an important energy source in living organisms 4. the amount of a substance in a given area or volume 8. Process that requires oxygen 10. allowing certain substances to pass through it but not others (2 Words) 11. special type of diffusion by which water passes into and out of the cell 12. Process that does NOT require oxygen 15. an organism that obtains nutrients from the food it consumes 17. Does not require energy to move across membrane (2 Words) 18. allowing certain substances to pass through it but not others 19. organelle that produces much of the ATP made by a eukaryotic cell 20. process by which cells release energy in the absence of oxygen

Down 1. organic molecule main energy source for cells (2 Words) 2. organelle uses light energy to make carbohydrates from CO2 and H20 5. process by which organisms use energy from sunlight to make their own food in the form of organic compounds such as glucose 6. Process by which food molecules, oxygen, water, and other materials enter and leave through the cell membrane 7. pigment found in chloroplasts that absorbs energy from sunlight to help in the process of photosynthesis 9. process that releases energy by breaking down food molecules in the presence of oxygen (2 Words) 12. Movement across a membrane that requires energy (2 Words) 13. Removal of wastes out of a cell or organism 14. organic molecule main energy source for cells 16. Materials moving into cells or organisms