4. Compare how thermal and electrical energy transfer between objects and give an example of how you can experience electrical energy and thermal energy in daily life.

5. Explain the statement "No one really makes energy" and "No one really uses up energy" by using the Law of

conservation of energy and an evidence of energy transformations given in the text.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.