SCIENCE RULES!

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Across
  1. 1. the natural force of attraction exerted by the earth
  2. 3. a nucleic acid which contains genetic information about the human body
  3. 7. the process of removing water
  4. 9. the act of stretching
  5. 10. a statement showing the equality of two mathematical expressions, or a representation of a chemical reaction
  6. 12. the science of the relationships between organisms and their environments
Down
  1. 1. the branch of biology that studies heredity and variation in plants and animals
  2. 2. something that has a pH below 7.0
  3. 4. something that has a pH above 7.0
  4. 5. a poisonous gas found high in the earth’s atmosphere. This layer protects the earth from the sun’s radiation
  5. 6. the symbol relating to hydrogen ion (H+) concentration. Below 7.0 is acidic and above 7.0 is alkaline
  6. 8. the rubbing of one object or surface against another
  7. 11. a cell or organism that is a genetically identical copy