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Radio

Read the story and answer the questions to test your comprehension.

Radio works by transmitting electromagnetic waves through the air. When these waves are picked up by a radio receiver, they are transformed into sound that the human ear can hear. Radio waves even travel in the vacuum of outer space! The radio was first adopted in 1912 by the United States Navy and became widely available for civilians in the 1920's.

  1. 1. What kind of waves does radio use?
    1. a. Electromagnetic waves
    2. b. Microwaves
    3. c. Gamma rays
  2. 2. What picks up radio waves?
    1. a. A radio reciever
    2. b. A radio picker
    3. c. A radio speaker
  3. 3. Who first adopted the radio?
    1. a. The Army
    2. b. The Air Force
    3. c. The US Navy