Chain Crosswords Long Nature Hard — Set 4

Hard 15×15 Set 4
1
2
3
4
5
6
7
8
9
Across
  1. 1. A word related to science
  2. 3. Device for controlled nuclear reactions
  3. 6. Slow-moving river of ice
  4. 7. Diffusion of water through a membrane
  5. 8. Naturally occurring inorganic solid
  6. 9. Pure substance on periodic table
Down
  1. 1. Center of an atom or cell
  2. 2. Force attracting objects to Earth
  3. 4. A word related to science
  4. 5. Positively charged particle