SUBJECTS

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Across
  1. 4. the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
  2. 6. the science that studies living organisms
  3. 7. the sounds produced by singers or musical instruments (or reproductions of such sounds)
  4. 9. study of the earth's surface; includes people's responses to topography and climate and soil and vegetation
Down
  1. 1. the science of matter and energy and their interactions
  2. 2. a particular branch of scientific knowledge
  3. 3. the continuum of events occurring in succession leading from the past to the present and even into the future;
  4. 5. the official language of Britain and the United States and most of the Commonwealth countries
  5. 7. a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
  6. 8. any of the Sino-Tibetan languages spoken in China; regarded as dialects of a single language (even though they are mutually unintelligible) because they share an ideographic writing system