7th grade semester exam/ Denae Sansom

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Across
  1. 1. a substance that consists of two or more elements combined in a set ratio
  2. 6. a simple sugar which is an important energy source in living organisms
  3. 8. a diagram that shows many overlapping food chains
  4. 9. an organism that must consume other organisms in order to obtain energy.
  5. 14. energy stored in the bonds of molecules
  6. 17. to change from one form to another
  7. 18. wall rigid layer surrounding a plant cell that provides support strength and shape
  8. 19. the specific job or roll of an organelle
  9. 26. the basic unit of life
  10. 27. contains chlorophyll and makes food from sunlight plant cell only
  11. 28. an organism that obtains energy from the sun through the process of photosynthesis
  12. 29. an organism that breaks down waste and dead organisms
Down
  1. 2. two or more atoms joined together chemically
  2. 3. a group of similar cells that do the same sort of work
  3. 4. an organism that is able to produce its own food through the process of photosynthesis or chemosynthesis
  4. 5. energy of light
  5. 7. the process of physically breaking food into smaller pieces
  6. 10. the type of plant tissue that carries water and minerals from the roots to the leaves and gives support to the system or trunk
  7. 11. the role that an animal or plant plays within the environment
  8. 12. a green pigment in all green plants that id responsible for the absorption of light to provide energy for photosynthesis
  9. 13. a group of tissues that work together to preform a specific function
  10. 15. energy given off during a transformation
  11. 16. a series of events in which one organism eats another in order to gain energy
  12. 20. cells are the basic unit of life all living things are made from one or more cells and all cells come from other living cells
  13. 21. all of the living and nonliving things that interact within and area
  14. 22. controls the activities of the cell
  15. 23. the type of plant tissue that transports food from the leaves to the other parts of the plant
  16. 24. the movement of energy through a food chain in an ecosystem
  17. 25. an organism that gains energy by feeding on other organisms