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Across
  1. 2. Part of a cell that controls what goes in to and out of the cell (cell ___________)
  2. 5. Type of energy transfer (sound and light are examples of this)
  3. 7. A type of chemical bond in which electrons are shared between atoms
  4. 10. Store of energy to do with movement
  5. 11. Part of a cell that makes proteins
  6. 16. The subatomic particle that has no charge
  7. 17. How much energy an appliance wastes/uses usefully is referred to as its _____________
  8. 19. Part of a cell that stores genetic material and controls the cell
  9. 20. Store of energy found in food, batteries and fuel
  10. 21. Type of energy transfer than involves forces
Down
  1. 1. Store of energy to do with height above the ground
  2. 3. The subatomic particle that has a negative charge
  3. 4. The number of protons and neutrons an atom has is known as the ______ number
  4. 6. Part of a cell that releases energy
  5. 8. The number of protons an atom has is known as the __________ number
  6. 9. Type of energy transfer that involves a hooter object warming up a colder object
  7. 12. The part of an atom where the protons and neutrons are found
  8. 13. A type of chemical bond in which electrons are transferred from one atom to another
  9. 14. The subatomic particle that ahs a positive charge
  10. 15. Store of energy to do with the temperature of an object
  11. 18. Store of energy to do with stretching and compressing