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Flying into Space

Flying into Space. 1. In _____, Man enter into space successfully. . 1960s. 1950s. 1970s. 1940s. 2. Human invented aeroplanes in 1920s, why they need to take 60 years later that man can fly into space? . (I) Only . (I) & (II) only. (I), (II) & (III) only. (I), (II), (III) & (IV).

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Flying into Space

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  1. Flying into Space

  2. 1. In _____, Man enter into space successfully. 1960s 1950s 1970s 1940s

  3. 2. Human invented aeroplanes in 1920s, why they need to take 60 years later that man can fly into space? (I) Only (I) & (II) only (I), (II) & (III) only (I), (II), (III) & (IV) Rockets must have sufficient propulsive force. Rockets and spacecraft needed to free themselves from the gravity of earth. Sophisticated electronics and engines are required. Human have little knowledge about the nature of action and reaction force.

  4. 3.Which force is in pairs with action? gravity friction reaction air resistance

  5. 4. Why is it necessary for rocket to bring oxidizing agents to produce oxygen? The percentage of oxygen in space is lower than that of carbon dioxide. Oxidizing agent can produce oxygen for complete combustion of fuel. The oxygen in the space is not suitable for combustion. There is no oxygen and air in space.

  6. 5.The most common oxidizing agent used in rocket is liquid hydrogen liquid helium liquid nitrogen liquid oxygen

  7. 6. Which of the following is NOT the fuel used in rocket ? gas fuel liquid fuel solid fuel

  8. 7. Why is it impossible to use solid fuel to launch a manned spaceship? Solid fuel rockets are heavier. The load of a rocket using solid fuel must be able to withstand pressure more than 10 times that of atmospheric pressure. The time of combustion of solid fuel is shorter. Burning solid fuel may cause pollution.

  9. 8. Liquid hydrogen inside the liquid fuel can be produced from the decomposition of _____. Coal Water Crude oil Natural gas

  10. 9. Most parts of the rocket are used to store scientific equipments The engine air fuel

  11. 10. Most of the rocket is used to store the fuel and oxidizing agent for combustion. The remaining portion is for storing (I) & (II) (II) & (III) (I), (II) & (III) (I), (II), (III) & (IV) Space Cabin Control system Propelling engine Rocket booster

  12. 11. Which of the followings correctly state the structural difference between a rocket and a jet plane? (I) only (I) & (II) only (II) & (III) only (I), (II) & (III) • The engine of a rocket has to generate a much greater thrust than that of a jet plane. • most parts in a rocket are used to carry liquid fuel and an oxidizing agent. • Jet planes need to have streamlined body while rockets do not.

  13. 12. Rockets have a streamlined design because it can reduce air resistance. it can reduce weight. it can carry more fuel. it can increase friction.

  14. 13. The shape of the space cabin for people that landed on the Moon is like a beetle jet plane parachute satellite

  15. 14. The first cosmic speed is about 0.79km per second. 7.9km per second. 79km per second. 790km per second.

  16. 15. If a rocket wants to escape from gravity, its speed need to reach the first cosmic speed. the second cosmic speed. the third cosmic speed. the fourth cosmic speed.

  17. 16. How can astronauts maintain good condition of muscle and bone in space? They need to take food of higher energy value. They have to exercise appropriately to keep them healthy. They need to absorb more UV. They need to take food rich in iron.

  18. 17. A spacesuit specially designed to (I) prevent being hit by space duct. (II) overcome the extreme temperature changes. (III) reduce the weight of the spacesuit. (IV) keep out harmful radiation. (I), (II) & (III) only. (II), (III) & (IV) only. (I), (II) & (IV) only. (I), (II), (III) , (IV)

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