Crossword Time

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Across
  1. 4. Hair-like structures in the upper part of respiratory tract.
  2. 5. The modern periodic table was invented by Henry
  3. 6. The SI unit of power of lens.
  4. 7. The process of forming a thick oxide layer of aluminium.
Down
  1. 1. First step in the breaking down of glucose into three carbon molecule called.
  2. 2. Who was the first to arrange all the elements.
  3. 3. is also known as near-sightedness.
  4. 4. Most reactive non metal