chapter one

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Across
  1. 3. the steepness of a line , equal too the ratio of vertical change to the corresponding horizontal change
  2. 8. the closeness of a measurement to the true value of what is measured
  3. 9. use of knowledge to solve practical problems
  4. 12. the study of the universe beyond earth
  5. 14. a relationship between two variables in which their ratio is constant .
  6. 15. the study of the origin , history and structure of earth
Down
  1. 1. information obtained through the senses
  2. 2. the study of the composition , structive,properties and reactions of matter .
  3. 4. the study of matter and energy and the interactions between the two through forces and motion
  4. 5. the ratio of a material's mass to its volume
  5. 6. a gauge of how exact a measurement is .
  6. 7. a system of knowledge about the natural world and the methods used to find that information.
  7. 10. the straight line distance between two points
  8. 11. the study of life and life process .
  9. 13. a representation of an object or event