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प्रश्न
What makes the Sun so hot?
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उत्तर
The Sun is a large hot gaseous body. It is 1.3 million times bigger than Earth. The surface temperature of the Sun is about 6000°C. In the core of the Sun, the temperature is estimated to be about 20,000,000°C. Such extremely high temperature is produced by the conversion of hydrogen into helium by the process of fusion. This process releases tremendous amounts of energy and Sim radiates the energy in the form of electromagnetic radiation.
संबंधित प्रश्न
Fill in the blanks:
The earth rotates from ____ to ____.
Fill in the blank:
A typical galaxy may contain ___________ stars.
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?
How much time does a ray of moonlight take to reach the Earth?
How many planets are there in the Solar System?
Which planet has only one satellite?
Name the following:
Two planets which are nearer to the sun than the Earth.
What information do man-made satellites provide?
______ is called Earth’s twin.
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
