Semester Review

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Across
  1. 6. a reaction where energy goes in, and the products often end cold
  2. 7. the scientist that created a Nitrogen fixation process, often used for fertilizer
  3. 9. stored energy depending on the position of the object
  4. 11. an ion with a positive charge
  5. 12. the phase change when a gas changes directly to a solid
  6. 14. the splitting of atomic nuclei that releases mass amounts of energy
  7. 15. element 8
  8. 16. anything that has mass and takes up space
  9. 17. the equation that is represented by mass divided by volume
  10. 19. two hydrogen atoms coming together from mass temperature and pressure, forming a He atom
  11. 20. A scientist that created the principle of equilibrium, and also blew up his lab partner
Down
  1. 1. the energy required for a reaction to occur
  2. 2. a system where neither energy nor matter can escape
  3. 3. the ability to do work or transfer heat
  4. 4. a substance that repels water
  5. 5. the energy of movement
  6. 8. the chemical change that happens when iron interacts with water
  7. 9. an example of an endothermic reaction that happens in plants
  8. 10. a reaction where energy comes out of the reaction
  9. 13. the total heat content of a system
  10. 18. your favorite subject