1. Answer the following questions briefly.
How does a planet differ from a star?
(b) What is meant by the Solar System?
Name all the planets according to their distance from the sun
(87
(Why is the Earth called a unique planet?
(e) Why do we see only one side of the moon always?
3800
What is the Universe ?
Answers
Answer:
1: Stars: Stars are very big and hot celestial bodies made up of gases.
They have their own heat and light, which they emit in large amounts.
Planets: Planets are celestial bodies, usually smaller than stars.
They do not have their own heat and light. They are lit by the light of stars.
2:The term ‘Solar System’ refers to the family of the sun. The Sun, eight planets, satellites and some other celestial bodies known as asteroids, comets and meteoroids together form the Solar System.
3: In order of their distance from the sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
4: The earth is called a unique planet because:
It is the only planet which has favorable conditions that support life. It is neither too hot nor too cold.
It has water and air, which are very essential for our survival.
The air has life-supporting gases like oxygen
5:The Moon moves around the Earth in about 27 days. It exactly takes the same time to complete one spin on its own axis. As a result, only one side of the Moon is visible to us on the Earth.
6: A galaxy is a huge system of billions of stars, and clouds of dust and gases. Millions of such galaxies make up the universe.
Explanation:
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1) The celestial that has fixed path orbit in which it moves around the star are known as planet. Star have their on light whereas planet don't hasve their own light they reflect the sunlight that falls on the planet...
2) The solar system is the sun and all the objects that orbit around it. The sun is orbit by planets, asteroid , comets and other thing. The system is about 4.6 billion years old . The other object are pulled into orbit around the sun.
All the planet according to their distance from the sun are Mercury,Venus,Earth,Mars, Jupiter,Saturn,Urenus and Neptune...
3) If the only planet known to have life on it. The earth formed around 4.5 billon years ago. The large mass of the sun makes earth move around it just as the mass of earth.Makes the moon move around it Earth also turn around in space ...
4) The moon moves around the earth in about 27 days and it takes exactly the same time to complete one spin on it's axis. That's why we see only one side of the moon...
5) The universe is a collection of a. planets star , Galaxy , celestial bodies , dust clouds , lights etc... It considered as an endless space...
Explanation: