Thermal Energy Unit Review

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Across
  1. 3. This heating system is the best choice for Riverdale School
  2. 4. The _____ energy of a system never changes.
  3. 5. Calculated by adding all the numbers in a set and then dividing by the number of values in the set
  4. 8. The moment when two objects hit each other
  5. 9. A set of interacting parts forming a complex whole
  6. 12. A group of atoms joined together in a particular way
  7. 13. When something stays mostly the same over time
  8. 16. To reach a conclusion using evidence and reasoning
  9. 17. The energy an object has because it is moving
  10. 18. A balanced state in which a system is stable
Down
  1. 1. The total kinetic energy of all the molecules of a sample
  2. 2. When something gets hotter, its molecules move _____
  3. 6. Things are made of molecules or other types of _____ groups
  4. 7. A measure of how hot or cold something is
  5. 10. When something cools down, its molecules move _____
  6. 11. _____ isn't created or destroyed
  7. 14. To move from one object to another
  8. 15. When something becomes different over time