21. Robert H. Goddard, an American scientist, built the first liquid-fueled rocket, which he has successfully
A B C D
launched on March 16, 1926.
22. The innovators behind objects like the cellphone or the helicopter took inspiration from work like "Star
A B C D
Trek" and War of the Worlds.
23. How many people know that the Brooklyn Bridge, built in 1883, were the world's first suspension bridge?
A B C D
24. An X-ray microscope enables a person seeing through solid materials such as metal and bone.
A B C D
25. Inventor Granville Woods received him first patent on January 3, 1884, for a steam boiler furnace.
A B C D
