1. The type of energy stored is:

     a) Fossil fuels: Chemical energy

     b) A stretched spring: Elastic potential energy

     c) A battery: Chemical energy

     d) A raised ball before it falls: Gravitational potential energy

     e) Nuclei of uranium atoms: Nuclear energy

 2. a) When a battery is connected to a circuit, stored chemical energy is released.

     b) When fuels are burned, stored chemical energy is released.

     c) A piece of coal with the same dimensions as a piece of wood contains more concentrated energy.