1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration	Can one form of energy be changed into another? All forms of energy can be changed into other forms, but the total amount of energy remains the same. Sound energy turns into electrical energy and back again when we use the telephone. Sound energy turns into electrical energy when we use the telephone   Previous: Back Book: 1001 Section: Science and Technology Chapter: Force and Energy