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प्रश्न
What factors have made life on Earth possible?
उत्तर
The Earth where we live is the only planet in the solar system which supports life. Due to its right distance from the Sun it has the right temperature, the presence of water and suitable atmosphere and a blanket of ozone. All these have made continuation of life possible on the Earth. The axis of rotation of the Earth is not perpendicular to the plane of its orbit. The tilt is responsible for the change of seasons on the Earth.
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संबंधित प्रश्न
Mark the following statement as true (T) or false (F).
Uranus is the farthest planet in the solar system. ( )
Answer the following question briefly.
What is meant by the ‘Solar System’?
Fill in the Blanks
The planets do not possess their own ______ and ______.
Which planet is called “Earth’s twin” and why?
Prepare a table mentioning the length of the days and years of the planets.
The number of planets in our Solar System is ______.
The solar system is believed to have formed about ______ billion years ago.
Which among the planets has less length of a day?
Match the following:
| 1. | Mercury | a. | Hottest planet |
| 2. | Saturn | b. | Greenish star |
| 3. | Neptune | c. | Rocky planet |
| 4. | Venus | d. | Lightest planet |
Match the following:
| 1. | Ganymede | a. | Neptune |
| 2. | Triton | b. | Jupiter |
| 3. | Titan | c. | Mars |
| 4. | Phobias | d. | Saturn |
