A Difficult One

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Across
  1. 3. Small unit of a living organism, we have millions of them inside!
  2. 7. The stuff of life for long.
  3. 10. The study of things around us to explain the world
  4. 11. The stuff of life for short
  5. 13. This atmospheric stuff damages our lungs
  6. 15. Skin of large single stemmed plant can be smooth or rough
  7. 16. The study of things gone by
  8. 17. Large, single elongated stemmed plant with leaves or branches
Down
  1. 1. Ones and zeros are the heroes
  2. 2. Sometimes gold or silver coloured bio indicator
  3. 4. Tools & methods, software & hardware created to make our lives better
  4. 5. A number that just goes on and on, can be sweet or savory dish
  5. 6. A function all helpful technologies should aspire to being – think games!
  6. 8. Manipulating the stuff of life – for the better?
  7. 9. trees breathe in…
  8. 12. A piece of software that you can host on your phone, tablet or mobile device.
  9. 14. Trees breathe out…