The Earth and the Universe Quiz - CBSE Class 8 Social Science

Free practice quiz: The Earth and the Universe (CBSE Class 8 Social Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 8 Social Science practice quiz has 20 multiple-choice questions on The Earth and the Universe, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the shape of the Earth?

   1. Flat
   2. Sphere
   3. Cube
   4. Cylinder
   Show answer

   Answer: B. Sphere

   The Earth is an oblate spheroid, which means it is mostly spherical but slightly flattened at the poles and bulging at the equator. This shape is confirmed by satellite images and other scientific measurements.

2. What causes the seasons on Earth?

   1. Distance from the Sun
   2. Tilt of the Earth's axis
   3. Revolution around the Sun
   4. Atmospheric pressure
   Show answer

   Answer: B. Tilt of the Earth's axis

   Seasons are caused by the tilt of the Earth's rotational axis away or toward the Sun as Earth orbits it, affecting the amount of sunlight received.

3. Which layer of the Earth is liquid?

   1. Crust
   2. Mantle
   3. Outer core
   4. Inner core
   Show answer

   Answer: C. Outer core

   The outer core of the Earth is in a liquid state and is composed mostly of molten iron and nickel, while the inner core is solid.

4. What is a light year?

   1. Distance travelled by light in one year
   2. Time taken for light to travel
   3. A measure of time
   4. Speed of light
   Show answer

   Answer: A. Distance travelled by light in one year

   A light year is the distance that light travels in one year in a vacuum, approximately 9.46 trillion kilometers.

5. What is the main component of the Sun?

   1. Hydrogen
   2. Helium
   3. Oxygen
   4. Carbon
   Show answer

   Answer: A. Hydrogen

   The Sun is primarily composed of hydrogen (about 74%), which undergoes nuclear fusion to produce helium and energy.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which planet is known as the Red Planet?
2. What is the primary source of energy for the Earth?
3. What is Earth's atmosphere composed primarily of?
4. Which of the following is a terrestrial planet?
5. What celestial body orbits the Earth?
6. What is the term for a planet's path around the Sun?
7. What phenomenon occurs due to the rotation of the Earth?
8. Which of the following planets has the longest day?
9. Which gas is most responsible for the greenhouse effect on Earth?
10. Which celestial body has the most prominent rings?
11. What do we call the period when the Earth is farthest from the Sun?
12. How many moons does Mars have?
13. What describes the Milky Way?
14. What force keeps the planets in orbit around the Sun?
15. What is the main difference between asteroids and comets?

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