This is how a rocket works. It is not made of rubber like a balloon, of course. It is made of metal. The metal must not be heavy but it must be very strong. There is gas inside the rocket which is made very hot. When it rushes out of the end of the rocket, the rocket is pushed up into the air.
Rockets can fly fat out into space. Rockets with men inside them have already reached the moon. Several rockets, without men inside them, have been sent to other worlds much farther away. One day rockets may be able to go anywhere in the space.
4. Which of the following statements about a rocket is NOT true?
A) It can fly when there is no air.
B) It can fly without wings.
C) It is made of strong metal.
D) It is propelled by burning gas inside it.
5. A rocket is pushed up into the air when
A) hot gas rushes out of its head.
B) it is powered by gas.
C) hot gas rushes out of its bottom.
D) hot gas rushes out of its neck.
Keys: DADDC
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