English is easy

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Across
  1. 1. a triangle with unequal sides
  2. 3. the measure of the ease at which an electric charge or heat can pass through a material
  3. 5. converted into carbon or a carbonic residue
  4. 7. made or produced by human beings rather than occurring naturally
  5. 8. a triangle with three equal interior angles
  6. 9. being or seeming to be everywhere at the same time, omnipresent
Down
  1. 2. a triangle in which all three sides have the same length
  2. 4. able to adapt or be adapted to many different functions or activities
  3. 6. material that is used to stop the passage of electricity, heat, or sound from one conductor to another