KIDS QUIZ
SPACE EXPLORATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a machine that uses gas often from burning fuel, to escape Earth’s gravitational pull.
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Probe
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Space shuttle
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Rocket
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Lander
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Explanation:
Detailed explanation-1: -At-423 degrees Fahrenheit, the engine’s fuel, liquefied hydrogen, is the second coldest liquid on Earth. When it and the liquid oxygen are com-bined and combusted, the temperature in the main combustion chamber is 6, 000 degrees Fahrenheit, hotter than the boiling point of iron.
Detailed explanation-2: -The rocket’s main engines use a combination of liquid hydrogen and liquid oxygen. Hydrogen has the lowest molecular weight of any known substance, making it ideal for keeping the weight of a rocket relatively small. When combined with liquid oxygen, hydrogen creates the most efficient thrust of any rocket propellant.
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