CBSE Worksheet for Chapter - 9 Night Sky Class 8

Worksheets For class 8

Find CBSE Worksheet for chapter-9 Night Sky class 8

1. CLASS-8
2. BOARD: CBSE
3. PHYSICS Worksheet - 9
4. TOPIC: Night Sky
5. For other CBSE Worksheet for class 8 Science  check out main page of Physics Wallah.

SUMMARY

• Introduction, Astronomical distances
• The stars, galaxies, Constellation
• The solar system, Motion of earth
• Satellite

SECTION 1 – OBJECTIVE

1. Stars are mainly made up of:
   1. Oxygen and hydrogen
   2. Oxygen and nitrogen
   3. Hydrogen and helium
   4. Water and helium
2. Orion is the name of a:
   1. Star
   2. Planet
   3. Galaxy
   4. constellation
3. Any heavenly body having light of its own is called a:
   1. Nebulae
   2. Star
   3. Comet
   4. Meteorite
4. Galaxies are usually classified on the basis of their
   1. Mass
   2. Size
   3. Shape
   4. None of these
5. Indian name of milky way galaxy is :
   1. Akash Ganga
   2. Dhruv Tara
   3. Saptarishi
   4. None of these
6. The vast collection of billions of stars is called a:
   1. Universe
   2. Galaxy
   3. Constellation
   4. None of these
7. The Milky Way galaxy has a/an
   1. Elliptical shape
   2. Spiral shape
   3. Irregular shape
   4. None of these
8. Which of the following has highly elongated elliptical orbit?
   1. Asteroid
   2. Meteor
   3. Comet
   4. Meteorite
9. Ceres is:
   1. Satellite of the mars
   2. Satellite of the Jupiter
   3. An asteroid
   4. A meteorite
10. The tail of a comet usually extends to:
    1. 10kilometers
    2. 2 light years
    3. 800 million kilometers
    4. 1.5 billion kilometers
11. Sources of energy in the sun is :
    1. Excitation of atoms
    2. Collision of atoms
    3. Breaking of heavy nuclei
    4. Combination of light nuclei
12. Lunar eclipse occurs when the:
    1. Sun comes between the earth and the moon
    2. Moon comes between the earth and the sun
    3. Earth comes between the sun and the moon
    4. Earth and the moon collide with each other
13. Example of natural satellite is :
    1. Venus
    2. Comet
    3. Moon
    4. Sputnik-I
14. Which of the following Planet has highest known satellite?
    1. Mercury
    2. Jupiter
    3. Saturn
    4. Venus
15. On the day of Amavasya, the phase of moon is called:
    1. Full Moon
    2. New Moon
    3. Half Moon
    4. Crescent Moon

        

SECTION 2 – SUBJECTIVE

1. Why do stars twinkle?
2. What is a light year?
3. Why is life on mercury, venus and mars is not possible?
4. With the help of diagram explain the occurrence of a) Solar eclipse b) Lunar eclipse
5. Define artificial satellite. Write satellites use in practical life. Give five example of satellites which was launched by India

Solutions: to worksheet-9 Topic- Night

objective