Greek Roots cosm, dem, phys

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Across
  1. 2. a system of government by the whole population or all the eligible members of a state, typically through elected representatives.
  2. 5. found all over the world.
  3. 6. the science that deals with the general features of the universe, including the earth.
  4. 8. a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe.
  5. 9. the branch of biology that deals with the normal functions of living organisms and their parts.
  6. 11. a subject of natural science concerned with the physical processes and properties of Earth
  7. 12. relating to the universe or cosmos, especially as distinct from the earth.
  8. 13. a widespread occurrence of an infectious disease in a community at a particular time.
  9. 14. a Russian astronaut.
  10. 15. a person qualified to practice medicine.
Down
  1. 1. an advocate or supporter of democracy.
  2. 3. in a way that relates to the real world and things perceived through the senses as opposed to the mind.
  3. 4. relating to the structure of populations.
  4. 7. a community, place, or situation regarded as encapsulating in miniature the characteristic qualities or features of something much larger.
  5. 8. the branch of science concerned with the nature and properties of matter and energy.
  6. 10. the form, size, and development of a person's body.
  7. 12. the science of the origin and development of the universe.