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प्रश्न
Write a note on the inner planets.
उत्तर
The planets are spaced unevenly. The first four planets are relatively close together and close to the Sun. They form the inner solar system. The four planets grouped together in the inner solar system are Mercury, Venus, Earth and Mars. They are called inner planets.
They have a surface of solid rock crust and so are called terrestrial or rocky planets. Their insides, surfaces and atmospheres are formed in a similar way and form similar pattern. Our planet, Earth can be taken as a model of the other three planets.
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संबंधित प्रश्न
Answer the following question briefly.
What is the Universe?
Fill in the blanks.
Planets do not have their own________ and ___________________.
Which planet is called “Earth’s twin” and why?
______ is the centre of the solar system.
State whether true or false. If false, correct the statement.
Mars is called the red planet.
The number of moons present in Saturn is ______.
Pluto crosses the orbit of Neptune in every ______.
______ is the only moon in the solar system that moves in the opposite direction to the direction in which its planet spins.
Assertion: Earth appears bluish-green.
Reason: This is due to the reflection of light from water and land mass on its surface.
Numerical problems:
The mean distance of Earth from the Sun is 149.6 × 106 km and the mean distance of mercury from the sun is 57.9× 106km. The period of Earth’s revolution is 1 year. What is the period of Mercury’s revolution?
