Science Week 2021

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Across
  1. 3. Turn liquid to solid (6)
  2. 5. The layer of skin on the outside of the body (9)
  3. 10. Used by astronomers to study stars and planets (9)
  4. 13. Acid and base react to create this and water (4)
  5. 16. Animals that are active during twilight (11)
  6. 18. Allows an object to float on water (8)
  7. 20. Evidence based on experience (7)
  8. 23. Stellar explosion (9)
  9. 24. First part of any food chain (8)
  10. 25. the number of waves that pass a fixed point in unit time (9)
Down
  1. 1. Changing direction of light through a lens (10)
  2. 2. Only person to win Nobel Prize in two scientific fields (5-5)
  3. 4. Plantae is one of these (7)
  4. 6. A push or a pull (5)
  5. 7. Scared of water (11)
  6. 8. An object's resistance to change in motion (7)
  7. 9. Fall out of (10)
  8. 11. Smallest bone in human body (6)
  9. 12. Its two satellites are named Phobos and Deimos (4)
  10. 14. Alloy of copper and tin (6)
  11. 15. A prediction of what will happen in an experiment(10)
  12. 17. North-South lines of Earth's surface (8)
  13. 19. Type of variable that is measured (9)
  14. 21. 20th Element of the Periodic Table (7)
  15. 22. Fluid's ability to resist flowing (9)