Mind Museum Extra credit crossword puzzle

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Across
  1. 4. The planet that is most similar to Earth’s physical conditions
  2. 6. The “ ” model is a theory placing the sun at the center of the universe and planets orbiting around it.
  3. 8. Refrigerators maintain their cold temperatures by heating gases called “ “
  4. 9. The kingdom of “ “ appeared on Earth about 1 million years ago
  5. 10. after the “ “ has formed, it creates energy at the hot dense core region through the nuclear fusion of hydrogen atoms into helium.
  6. 16. formation of the earth’s early atmosphere, oceans, crust and the moon
  7. 17. made up of mostly things that are dark and 5% made up of matter which include stars, planets, and galaxies
  8. 18. Nicolaus Copernicus is a (n) “ ” who first discovered the heliocentric theory
  9. 19. Long time ago people believed that the “ “ is the center of the universe
  10. 20. where the sunlight coming from (when you look at the moon around the earth
  11. 21. when two tectonic collide, one could slide beneath the other, causing the ground beneath it to rise
  12. 24. Glass is made by mixing silica, soda, and “ “.
  13. 25. The Earth’s atmosphere can “ “ radiations
  14. 26. ‘Si’ is the symbol of “ ” that has an atomic number of 28.09
Down
  1. 1. invisible because not even light can escape from their enormous gravitational pull
  2. 2. The Earth’s atmosphere partially blocks certain types of “ “ from outer space.
  3. 3. For eukaryotic cells “ “ generate most of the energy supply by building adenosine triphosphate (ATP)
  4. 5. The theory that stated that the Earth is the center of the universe is called “ ”
  5. 7. “ “ is the age of the amphibians about 318- 299 million years ago
  6. 10. Chitins are also found in the outer “ ” of insects
  7. 11. Glass defies classification because it maintains the properties of a “ “ even if it acts like a solid.
  8. 12. The cell walls of fungi are made up of “ “.
  9. 13. small piece of rock or metal that orbits around the sun
  10. 14. “(number)” Earth month = 1 complete turn
  11. 15. the basic “ “ bowl makes use of gravity to force water down (uses in the bathroom)
  12. 22. Isotopes makes the “ ” on the atomic mass of an atom
  13. 23. plates are huge, irregularly shaped slabs of rock under land masses and ocean