The impossible crossword-Michael Daniel

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Across
  1. 2. is defined as the average state
  2. 5. study of the natural world
  3. 7. is the natural science that studies matter
  4. 8. pattern is a regularity in the world
Down
  1. 1. is the state of the atmosphere
  2. 3. habitat is the type of natural environment
  3. 4. are that form the biological kingdom Animalia
  4. 6. a instrument used for giding
  5. 7. are mainly multicellular