Write true if the statement is true. If it is false, change the underlined word or words to make the statement true.
10.Mechanical energy is associated with the forces that hold particles together in an atom’s nucleus.
11. Electricity is a primary source of energy
. 12. Fossil fuels form in an environment with little or no oxygen.
13. Coal is used to generate about half the electricity in the United States.
14. In strip mining, miners dig shafts deep under-ground to reach the fossil fuel deposit.
15. When sulfide in rock surfaces reacts with oxygen and rainwater, acid drainage occurs.