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प्रश्न
For what purpose are rockets used in space travel?
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उत्तर
We use space launch technology to propel the spacecraft into outer space, defying gravity. It requires a tremendous amount of energy to launch the spacecraft, which is thousands of tons in weight. This energy is obtained through the burning of an ample quantity of fuel present in the rocket. Thus, rockets are used to launch the spacecraft in space travel.
संबंधित प्रश्न
Short Answer Question:
What is meant by Inner Planets? Name them.
Study the picture and answer the questions that follow.

(a) What does the picture show you about the earth?
(b) State briefly the Bedford Level Experiment.
(c) The sun rises and sets at different times in different places. What does the statement show the shape of the earth?
(d) In what way is the earth’s atmosphere beneficial to mankind?
State three factors which have made life possible on the Earth and on no other planet.
Arrange the nine planets of the solar system in order of their sizes.
Distinguish between the following pair.
Planet and Planetoids
Distinguish between the following pair.
Periodical and Non-periodical comets
Give reasons for the following:
No life is possible on Saturn.
The shape of the earth is not exactly that of a sphere Why?
In the picture below, correct the sequence of the planets from the sun.

Consider the following statements.
- The earth is the third planet in the solar system
- The Sun is made up of hot gases like Hydrogen and Nitrogen
- Mercury has no natural satellites
Choose the correct answer using the options given below
