NCERT Solution Class 6 Social Science Geography
Chapter 1: The Earth in the Solar System
Answer the following questions briefly.
(a) How does a planet differ from a star?
Answer: The difference between a planet and a star are:
(b) What is meant by the 'Solar System'?
Answer: Solar system is often termed as a family with Sun as its head. It is a system that contains eight planets, Sun, satellites, celestial bodies like meteoroids and asteroids.
(c) Name all the planets according to their distance from the sun.
Answer: The planets according to their distance from the sun are:
Thus, we can conclude that mercury is the nearest planet from the sun and Neptune is the farthest planet from the sun.
(d) Why the Earth is called a unique planet?
Answer: Earth is called a unique planet because,
(e) Why do we see only one side of the moon always?
Answer: The time taken by the moon to spin on its axis is the same as the time it takes to orbit the Earth. Hence, we can see only one side of the moon.
(f) What is the universe?
Answer: The millions of galaxies collectively make a universe. A galaxy is a collection of billions of stars, multiple planets, celestial bodies, clouds of dust and gases.
Tick the correct answers.
(a) The planet known as the "Earth's twin" is:
Answer: (iii) Venus
Explanation: Venus is known as the Earth's twin because its size and shape is similar to the Earth.
(b) Which is the third nearest planet to the sun?
Answer: (ii) Earth
Explanation: The Earth is the third nearest planet to the sun.
(c) All the planets move around the sun in a
Answer: (iii) Elongated path
Explanation: All the planets move around the sun in an elongated path known as orbits.
(d) The pole star indicates the direction to the
Answer: (ii) North
Explanation: The pole star in the sky indicates the north direction.
Fill in the Blanks.