Stars and the Solar System Quiz - CBSE Class 8 Science

Free practice quiz: Stars and the Solar System (CBSE Class 8 Science). 16 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which is the closest star to Earth?

   1. Sirius
   2. Betelgeuse
   3. Proxima Centauri
   4. Sun
   Show answer

   Answer: D. Sun

   The Sun is the star at the center of our solar system and is the closest star to Earth.

2. What is a light year?

   1. The time it takes light to travel one year
   2. The distance light travels in one year
   3. The distance from Earth to the Sun
   4. The time it takes for a star to complete one orbit
   Show answer

   Answer: B. The distance light travels in one year

   A light-year is a unit of distance, not time.

3. Explain the life cycle of a star, from its birth to its death.

   1. Nebula, Protostar, Main Sequence, Giant, Supernova/White Dwarf
   2. Nebula, Main Sequence, Giant, Supernova, Neutron Star
   3. Protostar, Giant, Supernova, Black Hole
   4. Nebula, Protostar, Main Sequence, Giant, White Dwarf/Neutron Star/Black Hole
   Show answer

   Answer: D. Nebula, Protostar, Main Sequence, Giant, White Dwarf/Neutron Star/Black Hole

   Stars form from nebulae, go through a main sequence stage, and then become giants. Their final state depends on their mass: smaller stars become white dwarfs, larger ones become neutron stars or black holes.

4. Explain the concept of redshift and its significance in understanding the expansion of the universe.

   1. Shift of light towards blue end of spectrum
   2. Shift of light towards red end of spectrum
   3. Increase in intensity of light
   4. Decrease in intensity of light
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   Answer: B. Shift of light towards red end of spectrum

   Redshift is the stretching of light waves as they travel from distant galaxies, indicating that the universe is expanding.

5. Compare and contrast the characteristics of a main sequence star, a red giant, and a white dwarf.

   1. Differences in size, temperature, luminosity and stage in life cycle
   2. Differences in composition
   3. Differences in distance from Earth
   4. No significant differences
   Show answer

   Answer: A. Differences in size, temperature, luminosity and stage in life cycle

   Main sequence stars are in their hydrogen-burning phase, red giants are in a later stage fusing helium, and white dwarfs are the remnants of stars.

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