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Solutions ⇒ Class 8th ⇒ Science ⇒ 17. Stars And The Solar System

Solutions 17. Stars And The Solar System - Additional Questions With Solutions | Class 8 Science - Toppers Study

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17. Stars And The Solar System

| Additional Questions With Solutions |

Solutions 17. Stars And The Solar System - Additional Questions With Solutions | Class 8 Science - Toppers Study


Additional Questions With Solutions


Ques : What are celestial object?
Ans : The stars, the planets, the moon and many other objects in the sky are called celestial objects.

Ques : Why the village skylooks clear from the night sky inbig cities?
Ans : In big cities is rarely clear due to bright light, smoke and dust, sky. There are no bright lights in the village sky and the atmosphere is clear.

Ques : Define full moon day.
Ans : The day on which the whole disc of the moon is visible is known as the full moon day.

Ques : What are phages of the moon?
Ans : The various shapes of the bright part of the moon as seen during a month are called phases of the moon.

Ques : What is the new moon day?
Ans : On the fifteenth day the moon is not visible. This day is known as the new moon day.

Ques : What is the crescent moon?
Ans : The next day of the new moon day, only a small portion of the moon appears in the sky. This is known as the crescent moon.

Ques : The moon has not it own light as stars but how do we able to see the moon?
Ans : We see the moon because the sunlight falling on it gets reflected towards us.

Ques : Why is the life not possible on the moon?
Ans : The moon has no useful substances for living like atmosphere and it has no water.

Ques : Define Light year?
Ans : The distance travelled by light in one year known as light year.

Ques : What is a constellation?
Ans : The stars forming a group that has a recognisable shape is called a constellation.

Ques : Write the situation of pole stare.
Ans : The Pole star lies close to the axis of rotation of the Earth.

Ques : When can you see the Great bear constellation or Saptarishi Tara Mandal?
Ans : We can see Great bear constellation or Saptarishi Tara Mandal during the summer time in the early part of the night.

Ques : Which constellation moves around the pole star?
Ans : Ursa Major Or Great Bear.

Ques : When can the Orion see in the sky?
Ans :   Orion is another well-known constellation that can be seen during winter in the late evenings

Que : What is satellite?
Ans : A body revolving around another body is called a satellite.

Que : Write the type of satellites.
Ans: There are two type of satellites.

  1. Natural satellite – The moon
  2. Artificial Satelite – Aryabhatt, INSAT, IRS and KalpanAns : I etc.

Que : Name the first natural satellite of India.
Ans : Aryabhatta.

Que : Differentiate between natural and artificial satellite.
Ans :

Natural Satellite

Artificial Satellite

  1. It is formed naturally.
  2. It can’t be launched .
  3. It revolves around the Earth farthest.
  4. Ex: The moon
  1. It is man-made.
  2. It can launched from the Earth.
  3. It revolves around the Earth much closer.
  4. Ex: Aryabhatt, INSAT.

Que : Define orbit?
Ans: A planet has a definite path in which it revolves around the Sun. This path is called an orbit. 

Que : Write the use of artificial satellites.
Ans :

  1. They are used for forecasting weather, transmitting television and radio signals.
  2. They are also used for telecommunication and remote sensing.

Que: Explain Period of revolution.
Ans : The time taken by a planet to complete one revolution is called its period of revolution.

Que : What is revolution?
Ans : The movement of planets around the sun on their orbit is called revolution.

Que : What is rotation ?
Ans : The planets move on their own axis like top, Such movement s known as rotation.

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Solutions ⇒ Class 8th ⇒ Science
1. Crop Production And Management
2. Microorganisms : Friend And Foe
3. Synthetic Fibres And Plastics
4. Materials : Metals And Non-Metals
5. Coal And Petroleum
6. Combustion And Flame
7. Conservation of Plants And Animals
8. Cell - Structure and functions
9. Reproduction in animals
10. Reaching the age of adolescence
11. Force And Pressure
12. Friction
13. Sound
14. Chemical Effects of Electric Current
15. Some Natural Phenomena
16. Light
17. Stars And The Solar System
18. Pollution of Air and Water

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