Exercise A. Read the following questions and answer them as briefly as possible. 1. What does ordinary air consist of? How are they incessantly jumping about? 2. Why should a rocket be shot with a speed of about seven miles a second? 3. Why does a projectile need a speed of 1 1/2 miles a second? 4. What will we discover if we ever picnic on the Moon? 5. Why is the Moon called a 'dead world? B. Find words from the passage that mean the same as the following words. 1. continuously (para 1) 2. exactly (para 2) 3. discovered (para 4)
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Explanation:
- The ordinary air consists of oxygen, nitrogen, and other gases in trace amounts. (Oxygen 79 % and oxygen 21%)
- A rocket should be shot with a speed of 7 miles/second to enter into orbit around the earth.
- The projectile needs a speed of 1 1/2 miles to propel in forwarding direction.
- If we ever picnic on the moon we will discover mountains and deserts on the moon.
- Moon is called the dead world because air does not exist there.
- The words are constant, absolutely, and find.
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