Chain Crosswords Long Science Medium — Set 1

Medium 13×13 Set 1
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8
Across
  1. 3. Tiny reproductive unit of fungi
  2. 6. A word related to science
  3. 7. Focused beam of coherent light
  4. 8. Fiber that transmits signals
Down
  1. 1. A word related to science
  2. 2. Simple machine for lifting
  3. 4. Mixture of two or more metals
  4. 5. Protective gas layer in atmosphere