Vocabulary contract #7

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Across
  1. 3. Positively charged particle of an atom.
  2. 7. A fossil fuel refined from natural gas and Petroleum.
  3. 9. Stored energy and the energy of position.
  4. 11. Looks like a black liquid also known as crude oil.
  5. 12. Energy of motion; motion of waves, electrons, atoms, molecules, and substances.
  6. 14. A colorless and odorless fossil fuel, made of mostly methane.
  7. 15. Heat energy from the Earth.
Down
  1. 1. Energy sources replenished in a short amount of time.
  2. 2. A solid, black, fossil fuel used for energy.
  3. 4. Energy created by the force of moving water.
  4. 5. Energy from natural matter that was once living.
  5. 6. Used in nuclear power plants to perform fission which spits the atoms creating energy.
  6. 8. Table where elements are organized by increasing atomic number.
  7. 10. Energy sources replenished slower than they are used.
  8. 13. Substance made up of atoms with the same identity.