Science 1

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 1. Shelf that projects from wall above fireplace (6)
  2. 2. Hard outer layer of the Earth or of bread (5)
  3. 6. Any process determined by the atomic and molecular composition and structure of the substances (14)
  4. 9. A system formed by the interaction of a community of organisms with their physical environment (9)
  5. 10. An organism or cell having the normal amount of DNA per cell (7)
  6. 11. Cell division in which the nucleus divides into nuclei containing the same number of chromosomes (7)
  7. 13. Characteristic life processes and phenomena of living organisms (7)
  8. 14. An elementary particle with negative charge (8)
  9. 15. A community of organisms where each member is eaten in turn by another member (9)

Down

  1. 1. The use of movements to communicate familiar or prearranged signals (6)
  2. 3. How plants make food from sunlight (14)
  3. 4. Any of the branches of natural ___ dealing with the structure and behavior of living organisms (11)
  4. 5. Understatement for rhetorical effect (7)
  5. 7. The science of matter (9)
  6. 8. Tiniest unit of living things (4)
  7. 12. The central part of the Earth (4)