Part A What is a radio galaxy? How can radio galaxies affect the gas surrounding them? Drag the items on the left to the appropriate blanks on the right to complete the sentences. (Not all terms will be used.)

A radio galaxy is a galaxy with a powerful radio luminance relative to the stars' visible and infrared luminosity. Radio galaxies can emit strong and speedy particle jets. They inject in their surroundings high amounts of kinetic energy. Many radio galaxies have jets of plasma shooting out in opposite direction. Thus they ionize the gases surrounding them.