energy

12345678910
Across
  1. 3. is the most abundant fossil fuel. It is not a widely used energy source due to the cost of mining and it's impurities.
  2. 6. rigs is the black, thick liquid pumped from below the earth's surface wherever you see an oil rig.
  3. 7. The sun is 93 million miles away and yet,this ball of hot gases is the primary source of all energy on earth.
  4. 9. when water is collected behind dams on large rivers, it provides a source of energy for the production of electricity.
  5. 10. the practical sources of energy include fossil fuels,natural gas, Petroleum (or oil), and coal.
Down
  1. 1. is the most powerful of all energy sources.
  2. 2. it's confused with gasoline.
  3. 4. fuel such as coal,oil, or natural gas formed from the remains of ancient plants and animals.
  4. 5. The unequal heating of the earth's surface by the sun produces wind energy, which can be converted into mechanical and electrical energy.
  5. 8. provides U.S. homes and industries have as much power as nuclear plants.