scn

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Across
  1. 2. The branch of science concerned with the nature and properties of matter and energy
  2. 5. A unit of length equal to one billionth of a meter
  3. 6. The branch of science concerned with the substances of which matter is composed, their properties and reactions
  4. 8. A unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale
  5. 10. The branch of biology that deals with the relations of organisms to one another and to their physical surroundings
  6. 13. The branch of science concerned with the study of the earth, its structure, and its changing physical features
  7. 14. The force that attracts a body towards the center of the earth, or towards any other physical body having mass
Down
  1. 1. The branch of science that deals with celestial objects, space, and the physical universe as a whole
  2. 3. A celestial object consisting of a nucleus of ice and dust, when near the sun a “tail” of gas and dust particles pointing away from the sun
  3. 4. A subatomic particle with a negative electric charge
  4. 7. The study of the physical and natural world through observation and experiment
  5. 9. The branch of science concerned with living organisms and life processes
  6. 11. A unit of measurement of temperature on the absolute scale
  7. 12. A unit of measurement for angles, one _______ is equivalent to 1/360th of a complete revolution
  8. 15. The smallest particle of a chemical element that can exist