1. Answer the following questions briefly.
(a) How does a planet differ from a star?
(b) What is meant by the 'Solar System"?
(c) Name all the planets according to their distance from the sun
(d)
Why is the Earth called a unique planet?
(e) Why do we see only one side of the moon always?
(1) What is the Universe ?
orrect answer
Answers
Qno.1 ans- *planet does not have its own light and heat. it derives its light from a star. A planet is usually smaller than star.
*A star possesses its own heat and light. Stars are very huge object compared to a planet is general.
Qno.2ans- The solar system is the sun and all the objects that orbit around it. The sun is orbited by planet, asteroids, comets and other things. The solar system is about 4.6 billion years old. it formed by gravity in a large molecula cloud.
Qno.3ans- Mercury, venus, earth, mars, Jupiter, Saturn, Uranus, Neptune.
Qno.4ans- The earth is cled unique planet becaus it is the only one planet which has favourable condition that support life. it is neither too hot nor too cold. it has water and air, which are very essential for our survival.
Qno.5ans- One side of the moon always faces Earth because of what's called synchronous rotation......because of synchronous rotation or tidal locking, our moon rotates on its axis in the same period that it revolves around the earth.
Qno.6ans- The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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Answer:
Q3 In our Solar System, there are eight planets. The planets in order from the Sun based on their distance are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune